From 8096dbddf0a73c0fa86aa421f7f763f56c5f37c3 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 24 May 2023 18:44:24 -0400
Subject: [PATCH 01/18] test: uncomment showcase-extended setup

---
 showcase/BUILD.bazel                          | 26 +++++++++----------
 .../gapic-showcase-extended/proto/BUILD.bazel | 10 +++----
 showcase/scripts/update.sh                    |  4 +--
 showcase/scripts/verify.sh                    |  4 +--
 4 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/showcase/BUILD.bazel b/showcase/BUILD.bazel
index 9c893230e0..a503736539 100644
--- a/showcase/BUILD.bazel
+++ b/showcase/BUILD.bazel
@@ -17,7 +17,7 @@ proto_library_with_info(
     name = "showcase_proto_with_info",
     deps = [
         "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_proto",
-#        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
+        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
         "@com_google_googleapis//google/cloud:common_resources_proto",
         "@com_google_googleapis//google/cloud/location:location_proto"
     ],
@@ -27,7 +27,7 @@ java_proto_library(
     name = "showcase_java_proto",
     deps = [
         "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_proto",
-#       "//showcase/gapic-showcase-extended/proto:showcase_proto_extended"
+        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended"
 ],
 )
 
@@ -37,13 +37,13 @@ java_grpc_library(
     deps = [":showcase_java_proto"],
 )
 
-#java_grpc_library(
-#    name = "showcase_java_grpc_extended",
-#    srcs = [
-#        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
-#    ],
-#    deps = [":showcase_java_proto"],
-#)
+java_grpc_library(
+    name = "showcase_java_grpc_extended",
+    srcs = [
+        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
+    ],
+    deps = [":showcase_java_proto"],
+)
 
 java_gapic_library(
     name = "showcase_java_gapic",
@@ -56,7 +56,7 @@ java_gapic_library(
     service_yaml = "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_v1beta1.yaml",
     test_deps = [
         ":showcase_java_grpc",
-#        ":showcase_java_grpc_extended",
+        ":showcase_java_grpc_extended",
         "@com_google_googleapis//google/cloud/location:location_java_grpc"
     ],
     transport = "grpc+rest",
@@ -121,10 +121,10 @@ sh_binary(
 # GRPC Showcase : Update and Verify
 GRPC_DATA = [
     "libshowcase_java_grpc-src.jar",
-#    "libshowcase_java_grpc_extended-src.jar",
+    "libshowcase_java_grpc_extended-src.jar",
     ":grpc_gapic_showcase_files",
     ":showcase_java_grpc",
-#    ":showcase_java_grpc_extended"
+    ":showcase_java_grpc_extended"
 ]
 
 sh_binary(
@@ -146,7 +146,7 @@ PROTO_DATA = [
     "proto-google-cloud-showcase-v1beta1-java.tar.gz",
     ":proto_gapic_showcase_files",
     ":showcase_java_proto",
-#    ":showcase_java_proto_extended",
+    ":showcase_java_proto_extended",
 ]
 
 sh_binary(
diff --git a/showcase/gapic-showcase-extended/proto/BUILD.bazel b/showcase/gapic-showcase-extended/proto/BUILD.bazel
index bc57596d1b..cdad5e509a 100644
--- a/showcase/gapic-showcase-extended/proto/BUILD.bazel
+++ b/showcase/gapic-showcase-extended/proto/BUILD.bazel
@@ -27,8 +27,8 @@ package(default_visibility = ["//visibility:public"])
 # gapic-showcase project is used to test the generated client behavior with a showcase server
 # gapic-showcase-extension project is used to test the generator's behavior
 
-#proto_library(
-#  name = "showcase_proto_extended",
-#  srcs = [],
-#  deps = []
-#)
\ No newline at end of file
+proto_library(
+  name = "showcase_proto_extended",
+  srcs = [],
+  deps = []
+)
\ No newline at end of file
diff --git a/showcase/scripts/update.sh b/showcase/scripts/update.sh
index f7b7e4ee7a..ad94efb740 100755
--- a/showcase/scripts/update.sh
+++ b/showcase/scripts/update.sh
@@ -40,13 +40,13 @@ case $1 in
   grpc)
     GRPC_PROJECT_DIR=grpc-gapic-showcase-v1beta1
     GRPC_JAR=$(find . -name 'libshowcase_java_grpc-src.jar')
-#    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
+    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
     clear_existing $GRPC_PROJECT_DIR
     create_unpack_dir grpc_unpacked
     GRPC_UNPACK_DIR=$PWD
 
     jar xf "$BAZEL_ROOT/$GRPC_JAR"
-#    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
+    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
     cd "$BUILD_WORKSPACE_DIRECTORY/showcase/$GRPC_PROJECT_DIR"
     mkdir -p ./src/main/java/com
     cp -r "$GRPC_UNPACK_DIR"/com/* ./src/main/java/com
diff --git a/showcase/scripts/verify.sh b/showcase/scripts/verify.sh
index 80cac43cad..6c4865b84c 100755
--- a/showcase/scripts/verify.sh
+++ b/showcase/scripts/verify.sh
@@ -39,12 +39,12 @@ case $1 in
   grpc)
     GRPC_PROJECT_DIR=grpc-gapic-showcase-v1beta1
     GRPC_JAR=$(find . -name 'libshowcase_java_grpc-src.jar')
-#    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
+    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
     create_unpack_dir grpc_unpacked
     GRPC_UNPACK_DIR=$PWD
 
     jar xf "$BAZEL_ROOT/$GRPC_JAR"
-#    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
+    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
     delete_unneeded
     diff -ru "$SHOWCASE_DIR/$GRPC_PROJECT_DIR"/src/main/java/com "$GRPC_UNPACK_DIR"/com
     ;;

From c5e0b3015df3c14aa209a44fe302fe84e5808d1c Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Thu, 25 May 2023 16:05:46 -0400
Subject: [PATCH 02/18] test: adjustments for showcase-extended setup

---
 showcase/BUILD.bazel                               | 2 +-
 showcase/gapic-showcase-extended/proto/BUILD.bazel | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/showcase/BUILD.bazel b/showcase/BUILD.bazel
index a503736539..e83cd1fe90 100644
--- a/showcase/BUILD.bazel
+++ b/showcase/BUILD.bazel
@@ -146,7 +146,7 @@ PROTO_DATA = [
     "proto-google-cloud-showcase-v1beta1-java.tar.gz",
     ":proto_gapic_showcase_files",
     ":showcase_java_proto",
-    ":showcase_java_proto_extended",
+    # ":showcase_java_proto_extended",
 ]
 
 sh_binary(
diff --git a/showcase/gapic-showcase-extended/proto/BUILD.bazel b/showcase/gapic-showcase-extended/proto/BUILD.bazel
index cdad5e509a..23577e8061 100644
--- a/showcase/gapic-showcase-extended/proto/BUILD.bazel
+++ b/showcase/gapic-showcase-extended/proto/BUILD.bazel
@@ -29,6 +29,8 @@ package(default_visibility = ["//visibility:public"])
 
 proto_library(
   name = "showcase_proto_extended",
-  srcs = [],
-  deps = []
+  srcs = [":wicked.proto"],
+  deps = [
+      "@com_google_googleapis//google/api:client_proto",
+  ]
 )
\ No newline at end of file

From ca740ba66f4cb16d9e2658e7b5db95beac27f179 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Thu, 25 May 2023 16:18:48 -0400
Subject: [PATCH 03/18] test: add proto to reproduce type collision issue

---
 .../gapic-showcase-extended/proto/BUILD.bazel | 19 ++++---
 .../proto/collisions.proto                    | 49 +++++++++++++++++++
 2 files changed, 61 insertions(+), 7 deletions(-)
 create mode 100644 showcase/gapic-showcase-extended/proto/collisions.proto

diff --git a/showcase/gapic-showcase-extended/proto/BUILD.bazel b/showcase/gapic-showcase-extended/proto/BUILD.bazel
index 23577e8061..91de49e161 100644
--- a/showcase/gapic-showcase-extended/proto/BUILD.bazel
+++ b/showcase/gapic-showcase-extended/proto/BUILD.bazel
@@ -16,7 +16,8 @@
 Provides proto_library target
 Exports grpc service config
 """
-load ("@rules_proto//proto:defs.bzl", "proto_library")
+
+load("@rules_proto//proto:defs.bzl", "proto_library")
 
 # This is an API workspace, having public visibility by default makes perfect sense.
 package(default_visibility = ["//visibility:public"])
@@ -28,9 +29,13 @@ package(default_visibility = ["//visibility:public"])
 # gapic-showcase-extension project is used to test the generator's behavior
 
 proto_library(
-  name = "showcase_proto_extended",
-  srcs = [":wicked.proto"],
-  deps = [
-      "@com_google_googleapis//google/api:client_proto",
-  ]
-)
\ No newline at end of file
+    name = "showcase_proto_extended",
+    srcs = [
+        ":collisions.proto",
+        ":wicked.proto",
+    ],
+    deps = [
+        "@com_google_googleapis//google/api:client_proto",
+        "@com_google_googleapis//google/longrunning:operations_proto",
+    ],
+)
diff --git a/showcase/gapic-showcase-extended/proto/collisions.proto b/showcase/gapic-showcase-extended/proto/collisions.proto
new file mode 100644
index 0000000000..009fcd77f9
--- /dev/null
+++ b/showcase/gapic-showcase-extended/proto/collisions.proto
@@ -0,0 +1,49 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+import "google/api/client.proto";
+import "google/longrunning/operations.proto";
+
+package google.showcase.v1beta1;
+
+option java_package = "com.google.showcase.v1beta1";
+option java_multiple_files = true;
+
+service Collisions {
+
+  option (google.api.default_host) = "localhost:7469";
+
+  rpc doSomething(Request) returns (google.longrunning.Operation) {
+    option (google.longrunning.operation_info) = {
+      response_type: "Annotation"
+      metadata_type: "Location"
+    };
+  }
+}
+
+message Request {
+  string name = 1;
+  Annotation annotation = 2;
+  Location location = 3;
+}
+
+message Annotation {
+  string name = 1;
+}
+
+message Location {
+  string name = 1;
+}
\ No newline at end of file

From 7ce408463c32c28cba63cc6e9a2d427a95cdd3f3 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Tue, 30 May 2023 21:43:09 -0400
Subject: [PATCH 04/18] test: add golden generated files for wicked and
 collisions protos

---
 .../SyncCreateSetCredentialsProvider.java     |  44 +
 .../SyncCreateSetCredentialsProvider1.java    |  39 +
 .../create/SyncCreateSetEndpoint.java         |  41 +
 .../dosomething/AsyncDoSomething.java         |  52 ++
 .../dosomething/AsyncDoSomethingLRO.java      |  55 ++
 .../dosomething/SyncDoSomething.java          |  50 +
 .../getlocation/AsyncGetLocation.java         |  45 +
 .../getlocation/SyncGetLocation.java          |  42 +
 .../listlocations/AsyncListLocations.java     |  54 ++
 .../AsyncListLocationsPaged.java              |  61 ++
 .../listlocations/SyncListLocations.java      |  50 +
 .../getlocation/SyncGetLocation.java          |  48 +
 .../getlocation/SyncGetLocation.java          |  48 +
 .../craftevilplan/SyncCraftEvilPlan.java      |  48 +
 .../AsyncBrainstormEvilPlans.java             |  49 +
 .../craftevilplan/AsyncCraftEvilPlan.java     |  46 +
 .../craftevilplan/SyncCraftEvilPlan.java      |  43 +
 .../SyncCreateSetCredentialsProvider.java     |  44 +
 .../SyncCreateSetCredentialsProvider1.java    |  39 +
 .../wicked/create/SyncCreateSetEndpoint.java  |  40 +
 .../wicked/getlocation/AsyncGetLocation.java  |  45 +
 .../wicked/getlocation/SyncGetLocation.java   |  42 +
 .../listlocations/AsyncListLocations.java     |  53 ++
 .../AsyncListLocationsPaged.java              |  61 ++
 .../listlocations/SyncListLocations.java      |  50 +
 .../AsyncPersuadeEvilPlan.java                |  63 ++
 .../craftevilplan/SyncCraftEvilPlan.java      |  48 +
 .../showcase/v1beta1/CollisionsClient.java    | 557 +++++++++++
 .../showcase/v1beta1/CollisionsSettings.java  | 256 +++++
 .../google/showcase/v1beta1/WickedClient.java | 554 +++++++++++
 .../showcase/v1beta1/WickedSettings.java      | 256 +++++
 .../showcase/v1beta1/gapic_metadata.json      |  42 +
 .../google/showcase/v1beta1/package-info.java |  38 +
 .../showcase/v1beta1/stub/CollisionsStub.java |  80 ++
 .../v1beta1/stub/CollisionsStubSettings.java  | 492 ++++++++++
 .../stub/GrpcCollisionsCallableFactory.java   | 115 +++
 .../v1beta1/stub/GrpcCollisionsStub.java      | 251 +++++
 .../stub/GrpcWickedCallableFactory.java       | 115 +++
 .../showcase/v1beta1/stub/GrpcWickedStub.java | 274 ++++++
 .../HttpJsonCollisionsCallableFactory.java    | 105 +++
 .../v1beta1/stub/HttpJsonCollisionsStub.java  | 295 ++++++
 .../stub/HttpJsonWickedCallableFactory.java   | 105 +++
 .../v1beta1/stub/HttpJsonWickedStub.java      | 274 ++++++
 .../showcase/v1beta1/stub/WickedStub.java     |  71 ++
 .../v1beta1/stub/WickedStubSettings.java      | 458 +++++++++
 .../v1beta1/CollisionsClientHttpJsonTest.java | 204 ++++
 .../v1beta1/CollisionsClientTest.java         | 257 ++++++
 .../showcase/v1beta1/MockCollisions.java      |  59 ++
 .../showcase/v1beta1/MockCollisionsImpl.java  |  81 ++
 .../google/showcase/v1beta1/MockWicked.java   |  59 ++
 .../showcase/v1beta1/MockWickedImpl.java      | 154 ++++
 .../v1beta1/WickedClientHttpJsonTest.java     | 216 +++++
 .../showcase/v1beta1/WickedClientTest.java    | 326 +++++++
 .../showcase/v1beta1/CollisionsGrpc.java      | 293 ++++++
 .../google/showcase/v1beta1/WickedGrpc.java   | 409 ++++++++
 .../google/showcase/v1beta1/Annotation.java   | 509 ++++++++++
 .../showcase/v1beta1/AnnotationOrBuilder.java |  21 +
 .../v1beta1/CollisionsOuterClass.java         |  90 ++
 .../google/showcase/v1beta1/EvilRequest.java  | 509 ++++++++++
 .../v1beta1/EvilRequestOrBuilder.java         |  21 +
 .../google/showcase/v1beta1/EvilResponse.java | 509 ++++++++++
 .../v1beta1/EvilResponseOrBuilder.java        |  21 +
 .../com/google/showcase/v1beta1/Location.java | 509 ++++++++++
 .../showcase/v1beta1/LocationOrBuilder.java   |  21 +
 .../com/google/showcase/v1beta1/Request.java  | 871 ++++++++++++++++++
 .../showcase/v1beta1/RequestOrBuilder.java    |  51 +
 .../showcase/v1beta1/WickedOuterClass.java    |  79 ++
 67 files changed, 10907 insertions(+)
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
 create mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
 create mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
 create mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
 create mode 100644 showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java
 create mode 100644 showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
 create mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java

diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
new file mode 100644
index 0000000000..507734e8e2
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider_sync]
+import com.google.api.gax.core.FixedCredentialsProvider;
+import com.google.showcase.v1beta1.CollisionsClient;
+import com.google.showcase.v1beta1.CollisionsSettings;
+import com.google.showcase.v1beta1.myCredentials;
+
+public class SyncCreateSetCredentialsProvider {
+
+  public static void main(String[] args) throws Exception {
+    syncCreateSetCredentialsProvider();
+  }
+
+  public static void syncCreateSetCredentialsProvider() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    CollisionsSettings collisionsSettings =
+        CollisionsSettings.newBuilder()
+            .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+            .build();
+    CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
new file mode 100644
index 0000000000..a60f10c365
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider1_sync]
+import com.google.showcase.v1beta1.CollisionsClient;
+import com.google.showcase.v1beta1.CollisionsSettings;
+
+public class SyncCreateSetCredentialsProvider1 {
+
+  public static void main(String[] args) throws Exception {
+    syncCreateSetCredentialsProvider1();
+  }
+
+  public static void syncCreateSetCredentialsProvider1() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    CollisionsSettings collisionsSettings = CollisionsSettings.newHttpJsonBuilder().build();
+    CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider1_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
new file mode 100644
index 0000000000..45bf928ae6
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_Create_SetEndpoint_sync]
+import com.google.showcase.v1beta1.CollisionsClient;
+import com.google.showcase.v1beta1.CollisionsSettings;
+import com.google.showcase.v1beta1.myEndpoint;
+
+public class SyncCreateSetEndpoint {
+
+  public static void main(String[] args) throws Exception {
+    syncCreateSetEndpoint();
+  }
+
+  public static void syncCreateSetEndpoint() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    CollisionsSettings collisionsSettings =
+        CollisionsSettings.newBuilder().setEndpoint(myEndpoint).build();
+    CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_Create_SetEndpoint_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
new file mode 100644
index 0000000000..8cdc664bbd
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_DoSomething_async]
+import com.google.api.core.ApiFuture;
+import com.google.longrunning.Operation;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.CollisionsClient;
+import com.google.showcase.v1beta1.Location;
+import com.google.showcase.v1beta1.Request;
+
+public class AsyncDoSomething {
+
+  public static void main(String[] args) throws Exception {
+    asyncDoSomething();
+  }
+
+  public static void asyncDoSomething() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      Request request =
+          Request.newBuilder()
+              .setName("name3373707")
+              .setAnnotation(Annotation.newBuilder().build())
+              .setLocation(Location.newBuilder().build())
+              .build();
+      ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
+      // Do something.
+      Operation response = future.get();
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_DoSomething_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
new file mode 100644
index 0000000000..0db7250549
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_DoSomething_LRO_async]
+import com.google.api.gax.longrunning.OperationFuture;
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.CollisionsClient;
+import com.google.showcase.v1beta1.Location;
+import com.google.showcase.v1beta1.Request;
+
+public class AsyncDoSomethingLRO {
+
+  public static void main(String[] args) throws Exception {
+    asyncDoSomethingLRO();
+  }
+
+  public static void asyncDoSomethingLRO() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      Request request =
+          Request.newBuilder()
+              .setName("name3373707")
+              .setAnnotation(Annotation.newBuilder().build())
+              .setLocation(Location.newBuilder().build())
+              .build();
+      OperationFuture<
+              DescriptorProtos.GeneratedCodeInfo.Annotation,
+              DescriptorProtos.SourceCodeInfo.Location>
+          future = collisionsClient.doSomethingOperationCallable().futureCall(request);
+      // Do something.
+      DescriptorProtos.GeneratedCodeInfo.Annotation response = future.get();
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_DoSomething_LRO_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
new file mode 100644
index 0000000000..dbc79d6476
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_DoSomething_sync]
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.CollisionsClient;
+import com.google.showcase.v1beta1.Location;
+import com.google.showcase.v1beta1.Request;
+
+public class SyncDoSomething {
+
+  public static void main(String[] args) throws Exception {
+    syncDoSomething();
+  }
+
+  public static void syncDoSomething() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      Request request =
+          Request.newBuilder()
+              .setName("name3373707")
+              .setAnnotation(Annotation.newBuilder().build())
+              .setLocation(Location.newBuilder().build())
+              .build();
+      DescriptorProtos.GeneratedCodeInfo.Annotation response =
+          collisionsClient.doSomethingAsync(request).get();
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_DoSomething_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
new file mode 100644
index 0000000000..2ec2689e0e
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_GetLocation_async]
+import com.google.api.core.ApiFuture;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.CollisionsClient;
+
+public class AsyncGetLocation {
+
+  public static void main(String[] args) throws Exception {
+    asyncGetLocation();
+  }
+
+  public static void asyncGetLocation() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+      ApiFuture<Location> future = collisionsClient.getLocationCallable().futureCall(request);
+      // Do something.
+      Location response = future.get();
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_GetLocation_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
new file mode 100644
index 0000000000..fb594b8e79
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_GetLocation_sync]
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.CollisionsClient;
+
+public class SyncGetLocation {
+
+  public static void main(String[] args) throws Exception {
+    syncGetLocation();
+  }
+
+  public static void syncGetLocation() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+      Location response = collisionsClient.getLocation(request);
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
new file mode 100644
index 0000000000..83716796aa
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_ListLocations_async]
+import com.google.api.core.ApiFuture;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.CollisionsClient;
+
+public class AsyncListLocations {
+
+  public static void main(String[] args) throws Exception {
+    asyncListLocations();
+  }
+
+  public static void asyncListLocations() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      ApiFuture<Location> future =
+          collisionsClient.listLocationsPagedCallable().futureCall(request);
+      // Do something.
+      for (Location element : future.get().iterateAll()) {
+        // doThingsWith(element);
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_ListLocations_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
new file mode 100644
index 0000000000..817d99ba25
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_ListLocations_Paged_async]
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.base.Strings;
+import com.google.showcase.v1beta1.CollisionsClient;
+
+public class AsyncListLocationsPaged {
+
+  public static void main(String[] args) throws Exception {
+    asyncListLocationsPaged();
+  }
+
+  public static void asyncListLocationsPaged() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      while (true) {
+        ListLocationsResponse response = collisionsClient.listLocationsCallable().call(request);
+        for (Location element : response.getLocationsList()) {
+          // doThingsWith(element);
+        }
+        String nextPageToken = response.getNextPageToken();
+        if (!Strings.isNullOrEmpty(nextPageToken)) {
+          request = request.toBuilder().setPageToken(nextPageToken).build();
+        } else {
+          break;
+        }
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_ListLocations_Paged_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
new file mode 100644
index 0000000000..a37b330b89
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Collisions_ListLocations_sync]
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.CollisionsClient;
+
+public class SyncListLocations {
+
+  public static void main(String[] args) throws Exception {
+    syncListLocations();
+  }
+
+  public static void syncListLocations() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      for (Location element : collisionsClient.listLocations(request).iterateAll()) {
+        // doThingsWith(element);
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Collisions_ListLocations_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
new file mode 100644
index 0000000000..f9dfd67664
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_CollisionsSettings_GetLocation_sync]
+import com.google.showcase.v1beta1.CollisionsSettings;
+import java.time.Duration;
+
+public class SyncGetLocation {
+
+  public static void main(String[] args) throws Exception {
+    syncGetLocation();
+  }
+
+  public static void syncGetLocation() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    CollisionsSettings.Builder collisionsSettingsBuilder = CollisionsSettings.newBuilder();
+    collisionsSettingsBuilder
+        .getLocationSettings()
+        .setRetrySettings(
+            collisionsSettingsBuilder
+                .getLocationSettings()
+                .getRetrySettings()
+                .toBuilder()
+                .setTotalTimeout(Duration.ofSeconds(30))
+                .build());
+    CollisionsSettings collisionsSettings = collisionsSettingsBuilder.build();
+  }
+}
+// [END localhost7469_v1beta1_generated_CollisionsSettings_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
new file mode 100644
index 0000000000..dce0590ab3
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub.samples;
+
+// [START localhost7469_v1beta1_generated_CollisionsStubSettings_GetLocation_sync]
+import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
+import java.time.Duration;
+
+public class SyncGetLocation {
+
+  public static void main(String[] args) throws Exception {
+    syncGetLocation();
+  }
+
+  public static void syncGetLocation() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    CollisionsStubSettings.Builder collisionsSettingsBuilder = CollisionsStubSettings.newBuilder();
+    collisionsSettingsBuilder
+        .getLocationSettings()
+        .setRetrySettings(
+            collisionsSettingsBuilder
+                .getLocationSettings()
+                .getRetrySettings()
+                .toBuilder()
+                .setTotalTimeout(Duration.ofSeconds(30))
+                .build());
+    CollisionsStubSettings collisionsSettings = collisionsSettingsBuilder.build();
+  }
+}
+// [END localhost7469_v1beta1_generated_CollisionsStubSettings_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
new file mode 100644
index 0000000000..de6207f682
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub.samples;
+
+// [START localhost7469_v1beta1_generated_WickedStubSettings_CraftEvilPlan_sync]
+import com.google.showcase.v1beta1.stub.WickedStubSettings;
+import java.time.Duration;
+
+public class SyncCraftEvilPlan {
+
+  public static void main(String[] args) throws Exception {
+    syncCraftEvilPlan();
+  }
+
+  public static void syncCraftEvilPlan() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    WickedStubSettings.Builder wickedSettingsBuilder = WickedStubSettings.newBuilder();
+    wickedSettingsBuilder
+        .craftEvilPlanSettings()
+        .setRetrySettings(
+            wickedSettingsBuilder
+                .craftEvilPlanSettings()
+                .getRetrySettings()
+                .toBuilder()
+                .setTotalTimeout(Duration.ofSeconds(30))
+                .build());
+    WickedStubSettings wickedSettings = wickedSettingsBuilder.build();
+  }
+}
+// [END localhost7469_v1beta1_generated_WickedStubSettings_CraftEvilPlan_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
new file mode 100644
index 0000000000..8bcb58afbb
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_BrainstormEvilPlans_async]
+import com.google.api.gax.rpc.BidiStream;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class AsyncBrainstormEvilPlans {
+
+  public static void main(String[] args) throws Exception {
+    asyncBrainstormEvilPlans();
+  }
+
+  public static void asyncBrainstormEvilPlans() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      BidiStream<EvilRequest, EvilResponse> bidiStream =
+          wickedClient.brainstormEvilPlansCallable().call();
+      EvilRequest request =
+          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+      bidiStream.send(request);
+      for (EvilResponse response : bidiStream) {
+        // Do something when a response is received.
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_BrainstormEvilPlans_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
new file mode 100644
index 0000000000..8be0e67e7c
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_async]
+import com.google.api.core.ApiFuture;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class AsyncCraftEvilPlan {
+
+  public static void main(String[] args) throws Exception {
+    asyncCraftEvilPlan();
+  }
+
+  public static void asyncCraftEvilPlan() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      EvilRequest request =
+          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+      ApiFuture<EvilResponse> future = wickedClient.craftEvilPlanCallable().futureCall(request);
+      // Do something.
+      EvilResponse response = future.get();
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
new file mode 100644
index 0000000000..4b7aeb0f9c
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_sync]
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class SyncCraftEvilPlan {
+
+  public static void main(String[] args) throws Exception {
+    syncCraftEvilPlan();
+  }
+
+  public static void syncCraftEvilPlan() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      EvilRequest request =
+          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+      EvilResponse response = wickedClient.craftEvilPlan(request);
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
new file mode 100644
index 0000000000..c4eb08016b
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider_sync]
+import com.google.api.gax.core.FixedCredentialsProvider;
+import com.google.showcase.v1beta1.WickedClient;
+import com.google.showcase.v1beta1.WickedSettings;
+import com.google.showcase.v1beta1.myCredentials;
+
+public class SyncCreateSetCredentialsProvider {
+
+  public static void main(String[] args) throws Exception {
+    syncCreateSetCredentialsProvider();
+  }
+
+  public static void syncCreateSetCredentialsProvider() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    WickedSettings wickedSettings =
+        WickedSettings.newBuilder()
+            .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+            .build();
+    WickedClient wickedClient = WickedClient.create(wickedSettings);
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
new file mode 100644
index 0000000000..904ca354a6
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider1_sync]
+import com.google.showcase.v1beta1.WickedClient;
+import com.google.showcase.v1beta1.WickedSettings;
+
+public class SyncCreateSetCredentialsProvider1 {
+
+  public static void main(String[] args) throws Exception {
+    syncCreateSetCredentialsProvider1();
+  }
+
+  public static void syncCreateSetCredentialsProvider1() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    WickedSettings wickedSettings = WickedSettings.newHttpJsonBuilder().build();
+    WickedClient wickedClient = WickedClient.create(wickedSettings);
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider1_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
new file mode 100644
index 0000000000..bff6d56f2b
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_Create_SetEndpoint_sync]
+import com.google.showcase.v1beta1.WickedClient;
+import com.google.showcase.v1beta1.WickedSettings;
+import com.google.showcase.v1beta1.myEndpoint;
+
+public class SyncCreateSetEndpoint {
+
+  public static void main(String[] args) throws Exception {
+    syncCreateSetEndpoint();
+  }
+
+  public static void syncCreateSetEndpoint() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    WickedSettings wickedSettings = WickedSettings.newBuilder().setEndpoint(myEndpoint).build();
+    WickedClient wickedClient = WickedClient.create(wickedSettings);
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_Create_SetEndpoint_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
new file mode 100644
index 0000000000..e2228a9939
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_GetLocation_async]
+import com.google.api.core.ApiFuture;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class AsyncGetLocation {
+
+  public static void main(String[] args) throws Exception {
+    asyncGetLocation();
+  }
+
+  public static void asyncGetLocation() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+      ApiFuture<Location> future = wickedClient.getLocationCallable().futureCall(request);
+      // Do something.
+      Location response = future.get();
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_GetLocation_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
new file mode 100644
index 0000000000..9a30312e45
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_GetLocation_sync]
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class SyncGetLocation {
+
+  public static void main(String[] args) throws Exception {
+    syncGetLocation();
+  }
+
+  public static void syncGetLocation() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+      Location response = wickedClient.getLocation(request);
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
new file mode 100644
index 0000000000..0ea2d5884a
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_ListLocations_async]
+import com.google.api.core.ApiFuture;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class AsyncListLocations {
+
+  public static void main(String[] args) throws Exception {
+    asyncListLocations();
+  }
+
+  public static void asyncListLocations() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      ApiFuture<Location> future = wickedClient.listLocationsPagedCallable().futureCall(request);
+      // Do something.
+      for (Location element : future.get().iterateAll()) {
+        // doThingsWith(element);
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_ListLocations_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
new file mode 100644
index 0000000000..c68cc6191a
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_ListLocations_Paged_async]
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.base.Strings;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class AsyncListLocationsPaged {
+
+  public static void main(String[] args) throws Exception {
+    asyncListLocationsPaged();
+  }
+
+  public static void asyncListLocationsPaged() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      while (true) {
+        ListLocationsResponse response = wickedClient.listLocationsCallable().call(request);
+        for (Location element : response.getLocationsList()) {
+          // doThingsWith(element);
+        }
+        String nextPageToken = response.getNextPageToken();
+        if (!Strings.isNullOrEmpty(nextPageToken)) {
+          request = request.toBuilder().setPageToken(nextPageToken).build();
+        } else {
+          break;
+        }
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_ListLocations_Paged_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
new file mode 100644
index 0000000000..f17136c827
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_ListLocations_sync]
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class SyncListLocations {
+
+  public static void main(String[] args) throws Exception {
+    syncListLocations();
+  }
+
+  public static void syncListLocations() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      for (Location element : wickedClient.listLocations(request).iterateAll()) {
+        // doThingsWith(element);
+      }
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_ListLocations_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
new file mode 100644
index 0000000000..88d9d4f18e
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_Wicked_PersuadeEvilPlan_async]
+import com.google.api.gax.rpc.ApiStreamObserver;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import com.google.showcase.v1beta1.WickedClient;
+
+public class AsyncPersuadeEvilPlan {
+
+  public static void main(String[] args) throws Exception {
+    asyncPersuadeEvilPlan();
+  }
+
+  public static void asyncPersuadeEvilPlan() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    try (WickedClient wickedClient = WickedClient.create()) {
+      ApiStreamObserver<EvilRequest> responseObserver =
+          new ApiStreamObserver<EvilRequest>() {
+            @Override
+            public void onNext(EvilResponse response) {
+              // Do something when a response is received.
+            }
+
+            @Override
+            public void onError(Throwable t) {
+              // Add error-handling
+            }
+
+            @Override
+            public void onCompleted() {
+              // Do something when complete.
+            }
+          };
+      ApiStreamObserver<EvilRequest> requestObserver =
+          wickedClient.persuadeEvilPlan().clientStreamingCall(responseObserver);
+      EvilRequest request =
+          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+      requestObserver.onNext(request);
+    }
+  }
+}
+// [END localhost7469_v1beta1_generated_Wicked_PersuadeEvilPlan_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
new file mode 100644
index 0000000000..ee9bc599ad
--- /dev/null
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.samples;
+
+// [START localhost7469_v1beta1_generated_WickedSettings_CraftEvilPlan_sync]
+import com.google.showcase.v1beta1.WickedSettings;
+import java.time.Duration;
+
+public class SyncCraftEvilPlan {
+
+  public static void main(String[] args) throws Exception {
+    syncCraftEvilPlan();
+  }
+
+  public static void syncCraftEvilPlan() throws Exception {
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    WickedSettings.Builder wickedSettingsBuilder = WickedSettings.newBuilder();
+    wickedSettingsBuilder
+        .craftEvilPlanSettings()
+        .setRetrySettings(
+            wickedSettingsBuilder
+                .craftEvilPlanSettings()
+                .getRetrySettings()
+                .toBuilder()
+                .setTotalTimeout(Duration.ofSeconds(30))
+                .build());
+    WickedSettings wickedSettings = wickedSettingsBuilder.build();
+  }
+}
+// [END localhost7469_v1beta1_generated_WickedSettings_CraftEvilPlan_sync]
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
new file mode 100644
index 0000000000..133186ef2a
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
@@ -0,0 +1,557 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import com.google.api.core.ApiFuture;
+import com.google.api.core.ApiFutures;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.httpjson.longrunning.OperationsClient;
+import com.google.api.gax.longrunning.OperationFuture;
+import com.google.api.gax.paging.AbstractFixedSizeCollection;
+import com.google.api.gax.paging.AbstractPage;
+import com.google.api.gax.paging.AbstractPagedListResponse;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PageContext;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.util.concurrent.MoreExecutors;
+import com.google.longrunning.Operation;
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.stub.CollisionsStub;
+import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * This class provides the ability to make remote calls to the backing service through method calls
+ * that map to API methods. Sample code to get started:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+ *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+ *   Location response = collisionsClient.getLocation(request);
+ * }
+ * }</pre>
+ *
+ * <p>Note: close() needs to be called on the CollisionsClient object to clean up resources such as
+ * threads. In the example above, try-with-resources is used, which automatically calls close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of CollisionsSettings to
+ * create(). For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CollisionsSettings collisionsSettings =
+ *     CollisionsSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CollisionsSettings collisionsSettings =
+ *     CollisionsSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
+ * }</pre>
+ *
+ * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
+ * the wire:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CollisionsSettings collisionsSettings = CollisionsSettings.newHttpJsonBuilder().build();
+ * CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class CollisionsClient implements BackgroundResource {
+  private final CollisionsSettings settings;
+  private final CollisionsStub stub;
+  private final OperationsClient httpJsonOperationsClient;
+  private final com.google.longrunning.OperationsClient operationsClient;
+
+  /** Constructs an instance of CollisionsClient with default settings. */
+  public static final CollisionsClient create() throws IOException {
+    return create(CollisionsSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of CollisionsClient, using the given settings. The channels are created
+   * based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final CollisionsClient create(CollisionsSettings settings) throws IOException {
+    return new CollisionsClient(settings);
+  }
+
+  /**
+   * Constructs an instance of CollisionsClient, using the given stub for making calls. This is for
+   * advanced usage - prefer using create(CollisionsSettings).
+   */
+  public static final CollisionsClient create(CollisionsStub stub) {
+    return new CollisionsClient(stub);
+  }
+
+  /**
+   * Constructs an instance of CollisionsClient, using the given settings. This is protected so that
+   * it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
+   */
+  protected CollisionsClient(CollisionsSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((CollisionsStubSettings) settings.getStubSettings()).createStub();
+    this.operationsClient =
+        com.google.longrunning.OperationsClient.create(this.stub.getOperationsStub());
+    this.httpJsonOperationsClient = OperationsClient.create(this.stub.getHttpJsonOperationsStub());
+  }
+
+  protected CollisionsClient(CollisionsStub stub) {
+    this.settings = null;
+    this.stub = stub;
+    this.operationsClient =
+        com.google.longrunning.OperationsClient.create(this.stub.getOperationsStub());
+    this.httpJsonOperationsClient = OperationsClient.create(this.stub.getHttpJsonOperationsStub());
+  }
+
+  public final CollisionsSettings getSettings() {
+    return settings;
+  }
+
+  public CollisionsStub getStub() {
+    return stub;
+  }
+
+  /**
+   * Returns the OperationsClient that can be used to query the status of a long-running operation
+   * returned by another API method call.
+   */
+  public final com.google.longrunning.OperationsClient getOperationsClient() {
+    return operationsClient;
+  }
+
+  /**
+   * Returns the OperationsClient that can be used to query the status of a long-running operation
+   * returned by another API method call.
+   */
+  @BetaApi
+  public final OperationsClient getHttpJsonOperationsClient() {
+    return httpJsonOperationsClient;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   Request request =
+   *       Request.newBuilder()
+   *           .setName("name3373707")
+   *           .setAnnotation(Annotation.newBuilder().build())
+   *           .setLocation(Location.newBuilder().build())
+   *           .build();
+   *   DescriptorProtos.GeneratedCodeInfo.Annotation response =
+   *       collisionsClient.doSomethingAsync(request).get();
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final OperationFuture<
+          DescriptorProtos.GeneratedCodeInfo.Annotation, DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingAsync(Request request) {
+    return doSomethingOperationCallable().futureCall(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   Request request =
+   *       Request.newBuilder()
+   *           .setName("name3373707")
+   *           .setAnnotation(Annotation.newBuilder().build())
+   *           .setLocation(Location.newBuilder().build())
+   *           .build();
+   *   OperationFuture<
+   *           DescriptorProtos.GeneratedCodeInfo.Annotation,
+   *           DescriptorProtos.SourceCodeInfo.Location>
+   *       future = collisionsClient.doSomethingOperationCallable().futureCall(request);
+   *   // Do something.
+   *   DescriptorProtos.GeneratedCodeInfo.Annotation response = future.get();
+   * }
+   * }</pre>
+   */
+  public final OperationCallable<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationCallable() {
+    return stub.doSomethingOperationCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   Request request =
+   *       Request.newBuilder()
+   *           .setName("name3373707")
+   *           .setAnnotation(Annotation.newBuilder().build())
+   *           .setLocation(Location.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
+   *   // Do something.
+   *   Operation response = future.get();
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<Request, Operation> doSomethingCallable() {
+    return stub.doSomethingCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists information about the supported locations for this service.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   ListLocationsRequest request =
+   *       ListLocationsRequest.newBuilder()
+   *           .setName("name3373707")
+   *           .setFilter("filter-1274492040")
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .build();
+   *   for (Location element : collisionsClient.listLocations(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final ListLocationsPagedResponse listLocations(ListLocationsRequest request) {
+    return listLocationsPagedCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists information about the supported locations for this service.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   ListLocationsRequest request =
+   *       ListLocationsRequest.newBuilder()
+   *           .setName("name3373707")
+   *           .setFilter("filter-1274492040")
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .build();
+   *   ApiFuture<Location> future =
+   *       collisionsClient.listLocationsPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Location element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    return stub.listLocationsPagedCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists information about the supported locations for this service.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   ListLocationsRequest request =
+   *       ListLocationsRequest.newBuilder()
+   *           .setName("name3373707")
+   *           .setFilter("filter-1274492040")
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .build();
+   *   while (true) {
+   *     ListLocationsResponse response = collisionsClient.listLocationsCallable().call(request);
+   *     for (Location element : response.getLocationsList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    return stub.listLocationsCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets information about a location.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+   *   Location response = collisionsClient.getLocation(request);
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Location getLocation(GetLocationRequest request) {
+    return getLocationCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets information about a location.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+   *   ApiFuture<Location> future = collisionsClient.getLocationCallable().futureCall(request);
+   *   // Do something.
+   *   Location response = future.get();
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    return stub.getLocationCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+
+  public static class ListLocationsPagedResponse
+      extends AbstractPagedListResponse<
+          ListLocationsRequest,
+          ListLocationsResponse,
+          Location,
+          ListLocationsPage,
+          ListLocationsFixedSizeCollection> {
+
+    public static ApiFuture<ListLocationsPagedResponse> createAsync(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ApiFuture<ListLocationsResponse> futureResponse) {
+      ApiFuture<ListLocationsPage> futurePage =
+          ListLocationsPage.createEmptyPage().createPageAsync(context, futureResponse);
+      return ApiFutures.transform(
+          futurePage,
+          input -> new ListLocationsPagedResponse(input),
+          MoreExecutors.directExecutor());
+    }
+
+    private ListLocationsPagedResponse(ListLocationsPage page) {
+      super(page, ListLocationsFixedSizeCollection.createEmptyCollection());
+    }
+  }
+
+  public static class ListLocationsPage
+      extends AbstractPage<
+          ListLocationsRequest, ListLocationsResponse, Location, ListLocationsPage> {
+
+    private ListLocationsPage(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ListLocationsResponse response) {
+      super(context, response);
+    }
+
+    private static ListLocationsPage createEmptyPage() {
+      return new ListLocationsPage(null, null);
+    }
+
+    @Override
+    protected ListLocationsPage createPage(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ListLocationsResponse response) {
+      return new ListLocationsPage(context, response);
+    }
+
+    @Override
+    public ApiFuture<ListLocationsPage> createPageAsync(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ApiFuture<ListLocationsResponse> futureResponse) {
+      return super.createPageAsync(context, futureResponse);
+    }
+  }
+
+  public static class ListLocationsFixedSizeCollection
+      extends AbstractFixedSizeCollection<
+          ListLocationsRequest,
+          ListLocationsResponse,
+          Location,
+          ListLocationsPage,
+          ListLocationsFixedSizeCollection> {
+
+    private ListLocationsFixedSizeCollection(List<ListLocationsPage> pages, int collectionSize) {
+      super(pages, collectionSize);
+    }
+
+    private static ListLocationsFixedSizeCollection createEmptyCollection() {
+      return new ListLocationsFixedSizeCollection(null, 0);
+    }
+
+    @Override
+    protected ListLocationsFixedSizeCollection createCollection(
+        List<ListLocationsPage> pages, int collectionSize) {
+      return new ListLocationsFixedSizeCollection(pages, collectionSize);
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
new file mode 100644
index 0000000000..b097ebb056
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientSettings;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.longrunning.Operation;
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link CollisionsClient}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (localhost) and default port (7469) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of getLocation to 30 seconds:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CollisionsSettings.Builder collisionsSettingsBuilder = CollisionsSettings.newBuilder();
+ * collisionsSettingsBuilder
+ *     .getLocationSettings()
+ *     .setRetrySettings(
+ *         collisionsSettingsBuilder
+ *             .getLocationSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * CollisionsSettings collisionsSettings = collisionsSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class CollisionsSettings extends ClientSettings<CollisionsSettings> {
+
+  /** Returns the object with the settings used for calls to doSomething. */
+  public UnaryCallSettings<Request, Operation> doSomethingSettings() {
+    return ((CollisionsStubSettings) getStubSettings()).doSomethingSettings();
+  }
+
+  /** Returns the object with the settings used for calls to doSomething. */
+  public OperationCallSettings<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationSettings() {
+    return ((CollisionsStubSettings) getStubSettings()).doSomethingOperationSettings();
+  }
+
+  /** Returns the object with the settings used for calls to listLocations. */
+  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      listLocationsSettings() {
+    return ((CollisionsStubSettings) getStubSettings()).listLocationsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to getLocation. */
+  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
+    return ((CollisionsStubSettings) getStubSettings()).getLocationSettings();
+  }
+
+  public static final CollisionsSettings create(CollisionsStubSettings stub) throws IOException {
+    return new CollisionsSettings.Builder(stub.toBuilder()).build();
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return CollisionsStubSettings.defaultExecutorProviderBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return CollisionsStubSettings.getDefaultEndpoint();
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return CollisionsStubSettings.getDefaultServiceScopes();
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return CollisionsStubSettings.defaultCredentialsProviderBuilder();
+  }
+
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return CollisionsStubSettings.defaultGrpcTransportProviderBuilder();
+  }
+
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return CollisionsStubSettings.defaultHttpJsonTransportProviderBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return CollisionsStubSettings.defaultTransportChannelProvider();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return CollisionsStubSettings.defaultApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new gRPC builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new REST builder for this class. */
+  @BetaApi
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected CollisionsSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+  }
+
+  /** Builder for CollisionsSettings. */
+  public static class Builder extends ClientSettings.Builder<CollisionsSettings, Builder> {
+
+    protected Builder() throws IOException {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(CollisionsStubSettings.newBuilder(clientContext));
+    }
+
+    protected Builder(CollisionsSettings settings) {
+      super(settings.getStubSettings().toBuilder());
+    }
+
+    protected Builder(CollisionsStubSettings.Builder stubSettings) {
+      super(stubSettings);
+    }
+
+    private static Builder createDefault() {
+      return new Builder(CollisionsStubSettings.newBuilder());
+    }
+
+    @BetaApi
+    private static Builder createHttpJsonDefault() {
+      return new Builder(CollisionsStubSettings.newHttpJsonBuilder());
+    }
+
+    public CollisionsStubSettings.Builder getStubSettingsBuilder() {
+      return ((CollisionsStubSettings.Builder) getStubSettings());
+    }
+
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
+      super.applyToAllUnaryMethods(
+          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
+      return this;
+    }
+
+    /** Returns the builder for the settings used for calls to doSomething. */
+    public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
+      return getStubSettingsBuilder().doSomethingSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to doSomething. */
+    public OperationCallSettings.Builder<
+            Request,
+            DescriptorProtos.GeneratedCodeInfo.Annotation,
+            DescriptorProtos.SourceCodeInfo.Location>
+        doSomethingOperationSettings() {
+      return getStubSettingsBuilder().doSomethingOperationSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to listLocations. */
+    public PagedCallSettings.Builder<
+            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+        listLocationsSettings() {
+      return getStubSettingsBuilder().listLocationsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to getLocation. */
+    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
+      return getStubSettingsBuilder().getLocationSettings();
+    }
+
+    @Override
+    public CollisionsSettings build() throws IOException {
+      return new CollisionsSettings(this);
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
new file mode 100644
index 0000000000..9a4fc0ec99
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
@@ -0,0 +1,554 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import com.google.api.core.ApiFuture;
+import com.google.api.core.ApiFutures;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.paging.AbstractFixedSizeCollection;
+import com.google.api.gax.paging.AbstractPage;
+import com.google.api.gax.paging.AbstractPagedListResponse;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.PageContext;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.util.concurrent.MoreExecutors;
+import com.google.showcase.v1beta1.stub.WickedStub;
+import com.google.showcase.v1beta1.stub.WickedStubSettings;
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Service Description: This service is used to show a Service with either non-enabled or
+ * non-eligible RPCs for HttpJson (Http 1.1). Non-Enabled: Missing the (google.api.http) annotation
+ * to enabled it Non-Eligible: BIDI and Client side streaming are not supported with Http 1.1
+ * Service name is reference to `No REST for the Wicked`
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * try (WickedClient wickedClient = WickedClient.create()) {
+ *   EvilRequest request =
+ *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+ *   EvilResponse response = wickedClient.craftEvilPlan(request);
+ * }
+ * }</pre>
+ *
+ * <p>Note: close() needs to be called on the WickedClient object to clean up resources such as
+ * threads. In the example above, try-with-resources is used, which automatically calls close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of WickedSettings to create().
+ * For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * WickedSettings wickedSettings =
+ *     WickedSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * WickedClient wickedClient = WickedClient.create(wickedSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * WickedSettings wickedSettings = WickedSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * WickedClient wickedClient = WickedClient.create(wickedSettings);
+ * }</pre>
+ *
+ * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
+ * the wire:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * WickedSettings wickedSettings = WickedSettings.newHttpJsonBuilder().build();
+ * WickedClient wickedClient = WickedClient.create(wickedSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class WickedClient implements BackgroundResource {
+  private final WickedSettings settings;
+  private final WickedStub stub;
+
+  /** Constructs an instance of WickedClient with default settings. */
+  public static final WickedClient create() throws IOException {
+    return create(WickedSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of WickedClient, using the given settings. The channels are created
+   * based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final WickedClient create(WickedSettings settings) throws IOException {
+    return new WickedClient(settings);
+  }
+
+  /**
+   * Constructs an instance of WickedClient, using the given stub for making calls. This is for
+   * advanced usage - prefer using create(WickedSettings).
+   */
+  public static final WickedClient create(WickedStub stub) {
+    return new WickedClient(stub);
+  }
+
+  /**
+   * Constructs an instance of WickedClient, using the given settings. This is protected so that it
+   * is easy to make a subclass, but otherwise, the static factory methods should be preferred.
+   */
+  protected WickedClient(WickedSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((WickedStubSettings) settings.getStubSettings()).createStub();
+  }
+
+  protected WickedClient(WickedStub stub) {
+    this.settings = null;
+    this.stub = stub;
+  }
+
+  public final WickedSettings getSettings() {
+    return settings;
+  }
+
+  public WickedStub getStub() {
+    return stub;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   EvilRequest request =
+   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   *   EvilResponse response = wickedClient.craftEvilPlan(request);
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final EvilResponse craftEvilPlan(EvilRequest request) {
+    return craftEvilPlanCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   EvilRequest request =
+   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   *   ApiFuture<EvilResponse> future = wickedClient.craftEvilPlanCallable().futureCall(request);
+   *   // Do something.
+   *   EvilResponse response = future.get();
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
+    return stub.craftEvilPlanCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   BidiStream<EvilRequest, EvilResponse> bidiStream =
+   *       wickedClient.brainstormEvilPlansCallable().call();
+   *   EvilRequest request =
+   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   *   bidiStream.send(request);
+   *   for (EvilResponse response : bidiStream) {
+   *     // Do something when a response is received.
+   *   }
+   * }
+   * }</pre>
+   */
+  public final BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
+    return stub.brainstormEvilPlansCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   ApiStreamObserver<EvilRequest> responseObserver =
+   *       new ApiStreamObserver<EvilRequest>() {
+   *         {@literal @}Override
+   *         public void onNext(EvilResponse response) {
+   *           // Do something when a response is received.
+   *         }
+   *
+   *         {@literal @}Override
+   *         public void onError(Throwable t) {
+   *           // Add error-handling
+   *         }
+   *
+   *         {@literal @}Override
+   *         public void onCompleted() {
+   *           // Do something when complete.
+   *         }
+   *       };
+   *   ApiStreamObserver<EvilRequest> requestObserver =
+   *       wickedClient.persuadeEvilPlan().clientStreamingCall(responseObserver);
+   *   EvilRequest request =
+   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   *   requestObserver.onNext(request);
+   * }
+   * }</pre>
+   */
+  public final ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
+    return stub.persuadeEvilPlanCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists information about the supported locations for this service.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   ListLocationsRequest request =
+   *       ListLocationsRequest.newBuilder()
+   *           .setName("name3373707")
+   *           .setFilter("filter-1274492040")
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .build();
+   *   for (Location element : wickedClient.listLocations(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final ListLocationsPagedResponse listLocations(ListLocationsRequest request) {
+    return listLocationsPagedCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists information about the supported locations for this service.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   ListLocationsRequest request =
+   *       ListLocationsRequest.newBuilder()
+   *           .setName("name3373707")
+   *           .setFilter("filter-1274492040")
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .build();
+   *   ApiFuture<Location> future = wickedClient.listLocationsPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Location element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    return stub.listLocationsPagedCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists information about the supported locations for this service.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   ListLocationsRequest request =
+   *       ListLocationsRequest.newBuilder()
+   *           .setName("name3373707")
+   *           .setFilter("filter-1274492040")
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .build();
+   *   while (true) {
+   *     ListLocationsResponse response = wickedClient.listLocationsCallable().call(request);
+   *     for (Location element : response.getLocationsList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    return stub.listLocationsCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets information about a location.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+   *   Location response = wickedClient.getLocation(request);
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Location getLocation(GetLocationRequest request) {
+    return getLocationCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets information about a location.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (WickedClient wickedClient = WickedClient.create()) {
+   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+   *   ApiFuture<Location> future = wickedClient.getLocationCallable().futureCall(request);
+   *   // Do something.
+   *   Location response = future.get();
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    return stub.getLocationCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+
+  public static class ListLocationsPagedResponse
+      extends AbstractPagedListResponse<
+          ListLocationsRequest,
+          ListLocationsResponse,
+          Location,
+          ListLocationsPage,
+          ListLocationsFixedSizeCollection> {
+
+    public static ApiFuture<ListLocationsPagedResponse> createAsync(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ApiFuture<ListLocationsResponse> futureResponse) {
+      ApiFuture<ListLocationsPage> futurePage =
+          ListLocationsPage.createEmptyPage().createPageAsync(context, futureResponse);
+      return ApiFutures.transform(
+          futurePage,
+          input -> new ListLocationsPagedResponse(input),
+          MoreExecutors.directExecutor());
+    }
+
+    private ListLocationsPagedResponse(ListLocationsPage page) {
+      super(page, ListLocationsFixedSizeCollection.createEmptyCollection());
+    }
+  }
+
+  public static class ListLocationsPage
+      extends AbstractPage<
+          ListLocationsRequest, ListLocationsResponse, Location, ListLocationsPage> {
+
+    private ListLocationsPage(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ListLocationsResponse response) {
+      super(context, response);
+    }
+
+    private static ListLocationsPage createEmptyPage() {
+      return new ListLocationsPage(null, null);
+    }
+
+    @Override
+    protected ListLocationsPage createPage(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ListLocationsResponse response) {
+      return new ListLocationsPage(context, response);
+    }
+
+    @Override
+    public ApiFuture<ListLocationsPage> createPageAsync(
+        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
+        ApiFuture<ListLocationsResponse> futureResponse) {
+      return super.createPageAsync(context, futureResponse);
+    }
+  }
+
+  public static class ListLocationsFixedSizeCollection
+      extends AbstractFixedSizeCollection<
+          ListLocationsRequest,
+          ListLocationsResponse,
+          Location,
+          ListLocationsPage,
+          ListLocationsFixedSizeCollection> {
+
+    private ListLocationsFixedSizeCollection(List<ListLocationsPage> pages, int collectionSize) {
+      super(pages, collectionSize);
+    }
+
+    private static ListLocationsFixedSizeCollection createEmptyCollection() {
+      return new ListLocationsFixedSizeCollection(null, 0);
+    }
+
+    @Override
+    protected ListLocationsFixedSizeCollection createCollection(
+        List<ListLocationsPage> pages, int collectionSize) {
+      return new ListLocationsFixedSizeCollection(pages, collectionSize);
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
new file mode 100644
index 0000000000..d818e2a2bf
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientSettings;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.stub.WickedStubSettings;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link WickedClient}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (localhost) and default port (7469) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of craftEvilPlan to 30 seconds:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * WickedSettings.Builder wickedSettingsBuilder = WickedSettings.newBuilder();
+ * wickedSettingsBuilder
+ *     .craftEvilPlanSettings()
+ *     .setRetrySettings(
+ *         wickedSettingsBuilder
+ *             .craftEvilPlanSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * WickedSettings wickedSettings = wickedSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class WickedSettings extends ClientSettings<WickedSettings> {
+
+  /** Returns the object with the settings used for calls to craftEvilPlan. */
+  public UnaryCallSettings<EvilRequest, EvilResponse> craftEvilPlanSettings() {
+    return ((WickedStubSettings) getStubSettings()).craftEvilPlanSettings();
+  }
+
+  /** Returns the object with the settings used for calls to brainstormEvilPlans. */
+  public StreamingCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
+    return ((WickedStubSettings) getStubSettings()).brainstormEvilPlansSettings();
+  }
+
+  /** Returns the object with the settings used for calls to persuadeEvilPlan. */
+  public StreamingCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
+    return ((WickedStubSettings) getStubSettings()).persuadeEvilPlanSettings();
+  }
+
+  /** Returns the object with the settings used for calls to listLocations. */
+  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      listLocationsSettings() {
+    return ((WickedStubSettings) getStubSettings()).listLocationsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to getLocation. */
+  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
+    return ((WickedStubSettings) getStubSettings()).getLocationSettings();
+  }
+
+  public static final WickedSettings create(WickedStubSettings stub) throws IOException {
+    return new WickedSettings.Builder(stub.toBuilder()).build();
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return WickedStubSettings.defaultExecutorProviderBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return WickedStubSettings.getDefaultEndpoint();
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return WickedStubSettings.getDefaultServiceScopes();
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return WickedStubSettings.defaultCredentialsProviderBuilder();
+  }
+
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return WickedStubSettings.defaultGrpcTransportProviderBuilder();
+  }
+
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return WickedStubSettings.defaultHttpJsonTransportProviderBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return WickedStubSettings.defaultTransportChannelProvider();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return WickedStubSettings.defaultApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new gRPC builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new REST builder for this class. */
+  @BetaApi
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected WickedSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+  }
+
+  /** Builder for WickedSettings. */
+  public static class Builder extends ClientSettings.Builder<WickedSettings, Builder> {
+
+    protected Builder() throws IOException {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(WickedStubSettings.newBuilder(clientContext));
+    }
+
+    protected Builder(WickedSettings settings) {
+      super(settings.getStubSettings().toBuilder());
+    }
+
+    protected Builder(WickedStubSettings.Builder stubSettings) {
+      super(stubSettings);
+    }
+
+    private static Builder createDefault() {
+      return new Builder(WickedStubSettings.newBuilder());
+    }
+
+    @BetaApi
+    private static Builder createHttpJsonDefault() {
+      return new Builder(WickedStubSettings.newHttpJsonBuilder());
+    }
+
+    public WickedStubSettings.Builder getStubSettingsBuilder() {
+      return ((WickedStubSettings.Builder) getStubSettings());
+    }
+
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
+      super.applyToAllUnaryMethods(
+          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
+      return this;
+    }
+
+    /** Returns the builder for the settings used for calls to craftEvilPlan. */
+    public UnaryCallSettings.Builder<EvilRequest, EvilResponse> craftEvilPlanSettings() {
+      return getStubSettingsBuilder().craftEvilPlanSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to brainstormEvilPlans. */
+    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
+      return getStubSettingsBuilder().brainstormEvilPlansSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to persuadeEvilPlan. */
+    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
+      return getStubSettingsBuilder().persuadeEvilPlanSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to listLocations. */
+    public PagedCallSettings.Builder<
+            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+        listLocationsSettings() {
+      return getStubSettingsBuilder().listLocationsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to getLocation. */
+    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
+      return getStubSettingsBuilder().getLocationSettings();
+    }
+
+    @Override
+    public WickedSettings build() throws IOException {
+      return new WickedSettings(this);
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json
index b79bfb905f..ec839e018f 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json
@@ -250,6 +250,48 @@
           }
         }
       }
+    },
+    "Collisions": {
+      "clients": {
+        "grpc": {
+          "libraryClient": "CollisionsClient",
+          "rpcs": {
+            "GetLocation": {
+              "methods": ["getLocation", "getLocationCallable"]
+            },
+            "ListLocations": {
+              "methods": ["listLocations", "listLocationsPagedCallable", "listLocationsCallable"]
+            },
+            "doSomething": {
+              "methods": ["doSomethingAsync", "doSomethingOperationCallable", "doSomethingCallable"]
+            }
+          }
+        }
+      }
+    },
+    "Wicked": {
+      "clients": {
+        "grpc": {
+          "libraryClient": "WickedClient",
+          "rpcs": {
+            "BrainstormEvilPlans": {
+              "methods": ["brainstormEvilPlansCallable"]
+            },
+            "CraftEvilPlan": {
+              "methods": ["craftEvilPlan", "craftEvilPlanCallable"]
+            },
+            "GetLocation": {
+              "methods": ["getLocation", "getLocationCallable"]
+            },
+            "ListLocations": {
+              "methods": ["listLocations", "listLocationsPagedCallable", "listLocationsCallable"]
+            },
+            "PersuadeEvilPlan": {
+              "methods": ["persuadeEvilPlanCallable"]
+            }
+          }
+        }
+      }
     }
   }
 }
\ No newline at end of file
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
index be1926a090..c198371fb0 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
@@ -155,6 +155,44 @@
  *   Session response = testingClient.createSession(request);
  * }
  * }</pre>
+ *
+ * <p>======================= CollisionsClient =======================
+ *
+ * <p>Sample for CollisionsClient:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
+ *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+ *   Location response = collisionsClient.getLocation(request);
+ * }
+ * }</pre>
+ *
+ * <p>======================= WickedClient =======================
+ *
+ * <p>Service Description: This service is used to show a Service with either non-enabled or
+ * non-eligible RPCs for HttpJson (Http 1.1). Non-Enabled: Missing the (google.api.http) annotation
+ * to enabled it Non-Eligible: BIDI and Client side streaming are not supported with Http 1.1
+ * Service name is reference to `No REST for the Wicked`
+ *
+ * <p>Sample for WickedClient:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * try (WickedClient wickedClient = WickedClient.create()) {
+ *   EvilRequest request =
+ *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+ *   EvilResponse response = wickedClient.craftEvilPlan(request);
+ * }
+ * }</pre>
  */
 @Generated("by gapic-generator-java")
 package com.google.showcase.v1beta1;
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
new file mode 100644
index 0000000000..efdbba6e54
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Request;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Base stub class for the Collisions service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public abstract class CollisionsStub implements BackgroundResource {
+
+  public OperationsStub getOperationsStub() {
+    return null;
+  }
+
+  public com.google.api.gax.httpjson.longrunning.stub.OperationsStub getHttpJsonOperationsStub() {
+    return null;
+  }
+
+  public OperationCallable<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationCallable() {
+    throw new UnsupportedOperationException("Not implemented: doSomethingOperationCallable()");
+  }
+
+  public UnaryCallable<Request, Operation> doSomethingCallable() {
+    throw new UnsupportedOperationException("Not implemented: doSomethingCallable()");
+  }
+
+  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    throw new UnsupportedOperationException("Not implemented: listLocationsPagedCallable()");
+  }
+
+  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    throw new UnsupportedOperationException("Not implemented: listLocationsCallable()");
+  }
+
+  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    throw new UnsupportedOperationException("Not implemented: getLocationCallable()");
+  }
+
+  @Override
+  public abstract void close();
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
new file mode 100644
index 0000000000..202c08ae6a
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
@@ -0,0 +1,492 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.ApiFuture;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GaxProperties;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.GrpcTransportChannel;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.grpc.ProtoOperationTransformers;
+import com.google.api.gax.httpjson.GaxHttpJsonProperties;
+import com.google.api.gax.httpjson.HttpJsonTransportChannel;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
+import com.google.api.gax.longrunning.OperationSnapshot;
+import com.google.api.gax.longrunning.OperationTimedPollAlgorithm;
+import com.google.api.gax.retrying.RetrySettings;
+import com.google.api.gax.rpc.ApiCallContext;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.PageContext;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.PagedListDescriptor;
+import com.google.api.gax.rpc.PagedListResponseFactory;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.longrunning.Operation;
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Request;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+import org.threeten.bp.Duration;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link CollisionsStub}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (localhost) and default port (7469) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of getLocation to 30 seconds:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CollisionsStubSettings.Builder collisionsSettingsBuilder = CollisionsStubSettings.newBuilder();
+ * collisionsSettingsBuilder
+ *     .getLocationSettings()
+ *     .setRetrySettings(
+ *         collisionsSettingsBuilder
+ *             .getLocationSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * CollisionsStubSettings collisionsSettings = collisionsSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class CollisionsStubSettings extends StubSettings<CollisionsStubSettings> {
+  /** The default scopes of the service. */
+  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
+      ImmutableList.<String>builder().build();
+
+  private final UnaryCallSettings<Request, Operation> doSomethingSettings;
+  private final OperationCallSettings<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationSettings;
+  private final PagedCallSettings<
+          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      listLocationsSettings;
+  private final UnaryCallSettings<GetLocationRequest, Location> getLocationSettings;
+
+  private static final PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>
+      LIST_LOCATIONS_PAGE_STR_DESC =
+          new PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>() {
+            @Override
+            public String emptyToken() {
+              return "";
+            }
+
+            @Override
+            public ListLocationsRequest injectToken(ListLocationsRequest payload, String token) {
+              return ListLocationsRequest.newBuilder(payload).setPageToken(token).build();
+            }
+
+            @Override
+            public ListLocationsRequest injectPageSize(ListLocationsRequest payload, int pageSize) {
+              return ListLocationsRequest.newBuilder(payload).setPageSize(pageSize).build();
+            }
+
+            @Override
+            public Integer extractPageSize(ListLocationsRequest payload) {
+              return payload.getPageSize();
+            }
+
+            @Override
+            public String extractNextToken(ListLocationsResponse payload) {
+              return payload.getNextPageToken();
+            }
+
+            @Override
+            public Iterable<Location> extractResources(ListLocationsResponse payload) {
+              return payload.getLocationsList() == null
+                  ? ImmutableList.<Location>of()
+                  : payload.getLocationsList();
+            }
+          };
+
+  private static final PagedListResponseFactory<
+          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      LIST_LOCATIONS_PAGE_STR_FACT =
+          new PagedListResponseFactory<
+              ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>() {
+            @Override
+            public ApiFuture<ListLocationsPagedResponse> getFuturePagedResponse(
+                UnaryCallable<ListLocationsRequest, ListLocationsResponse> callable,
+                ListLocationsRequest request,
+                ApiCallContext context,
+                ApiFuture<ListLocationsResponse> futureResponse) {
+              PageContext<ListLocationsRequest, ListLocationsResponse, Location> pageContext =
+                  PageContext.create(callable, LIST_LOCATIONS_PAGE_STR_DESC, request, context);
+              return ListLocationsPagedResponse.createAsync(pageContext, futureResponse);
+            }
+          };
+
+  /** Returns the object with the settings used for calls to doSomething. */
+  public UnaryCallSettings<Request, Operation> doSomethingSettings() {
+    return doSomethingSettings;
+  }
+
+  /** Returns the object with the settings used for calls to doSomething. */
+  public OperationCallSettings<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationSettings() {
+    return doSomethingOperationSettings;
+  }
+
+  /** Returns the object with the settings used for calls to listLocations. */
+  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      listLocationsSettings() {
+    return listLocationsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to getLocation. */
+  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
+    return getLocationSettings;
+  }
+
+  public CollisionsStub createStub() throws IOException {
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(GrpcTransportChannel.getGrpcTransportName())) {
+      return GrpcCollisionsStub.create(this);
+    }
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(HttpJsonTransportChannel.getHttpJsonTransportName())) {
+      return HttpJsonCollisionsStub.create(this);
+    }
+    throw new UnsupportedOperationException(
+        String.format(
+            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return InstantiatingExecutorProvider.newBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return "localhost:7469";
+  }
+
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "localhost:7469";
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return DEFAULT_SERVICE_SCOPES;
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return GoogleCredentialsProvider.newBuilder()
+        .setScopesToApply(DEFAULT_SERVICE_SCOPES)
+        .setUseJwtAccessWithScope(true);
+  }
+
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return InstantiatingGrpcChannelProvider.newBuilder()
+        .setMaxInboundMessageSize(Integer.MAX_VALUE);
+  }
+
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return InstantiatingHttpJsonChannelProvider.newBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return defaultGrpcTransportProviderBuilder().build();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultGrpcApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(CollisionsStubSettings.class))
+        .setTransportToken(
+            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultHttpJsonApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(CollisionsStubSettings.class))
+        .setTransportToken(
+            GaxHttpJsonProperties.getHttpJsonTokenName(),
+            GaxHttpJsonProperties.getHttpJsonVersion());
+  }
+
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return CollisionsStubSettings.defaultGrpcApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new gRPC builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new REST builder for this class. */
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected CollisionsStubSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+
+    doSomethingSettings = settingsBuilder.doSomethingSettings().build();
+    doSomethingOperationSettings = settingsBuilder.doSomethingOperationSettings().build();
+    listLocationsSettings = settingsBuilder.listLocationsSettings().build();
+    getLocationSettings = settingsBuilder.getLocationSettings().build();
+  }
+
+  /** Builder for CollisionsStubSettings. */
+  public static class Builder extends StubSettings.Builder<CollisionsStubSettings, Builder> {
+    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
+    private final UnaryCallSettings.Builder<Request, Operation> doSomethingSettings;
+    private final OperationCallSettings.Builder<
+            Request,
+            DescriptorProtos.GeneratedCodeInfo.Annotation,
+            DescriptorProtos.SourceCodeInfo.Location>
+        doSomethingOperationSettings;
+    private final PagedCallSettings.Builder<
+            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+        listLocationsSettings;
+    private final UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings;
+    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
+        RETRYABLE_CODE_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
+          ImmutableMap.builder();
+      definitions.put("no_retry_codes", ImmutableSet.copyOf(Lists.<StatusCode.Code>newArrayList()));
+      RETRYABLE_CODE_DEFINITIONS = definitions.build();
+    }
+
+    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
+      RetrySettings settings = null;
+      settings = RetrySettings.newBuilder().setRpcTimeoutMultiplier(1.0).build();
+      definitions.put("no_retry_params", settings);
+      RETRY_PARAM_DEFINITIONS = definitions.build();
+    }
+
+    protected Builder() {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(clientContext);
+
+      doSomethingSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      doSomethingOperationSettings = OperationCallSettings.newBuilder();
+      listLocationsSettings = PagedCallSettings.newBuilder(LIST_LOCATIONS_PAGE_STR_FACT);
+      getLocationSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              doSomethingSettings, listLocationsSettings, getLocationSettings);
+      initDefaults(this);
+    }
+
+    protected Builder(CollisionsStubSettings settings) {
+      super(settings);
+
+      doSomethingSettings = settings.doSomethingSettings.toBuilder();
+      doSomethingOperationSettings = settings.doSomethingOperationSettings.toBuilder();
+      listLocationsSettings = settings.listLocationsSettings.toBuilder();
+      getLocationSettings = settings.getLocationSettings.toBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              doSomethingSettings, listLocationsSettings, getLocationSettings);
+    }
+
+    private static Builder createDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultTransportChannelProvider());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
+
+      return initDefaults(builder);
+    }
+
+    private static Builder createHttpJsonDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
+
+      return initDefaults(builder);
+    }
+
+    private static Builder initDefaults(Builder builder) {
+      builder
+          .doSomethingSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+
+      builder
+          .listLocationsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+
+      builder
+          .getLocationSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+
+      builder
+          .doSomethingOperationSettings()
+          .setInitialCallSettings(
+              UnaryCallSettings.<Request, OperationSnapshot>newUnaryCallSettingsBuilder()
+                  .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+                  .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"))
+                  .build())
+          .setResponseTransformer(
+              ProtoOperationTransformers.ResponseTransformer.create(
+                  DescriptorProtos.GeneratedCodeInfo.Annotation.class))
+          .setMetadataTransformer(
+              ProtoOperationTransformers.MetadataTransformer.create(
+                  DescriptorProtos.SourceCodeInfo.Location.class))
+          .setPollingAlgorithm(
+              OperationTimedPollAlgorithm.create(
+                  RetrySettings.newBuilder()
+                      .setInitialRetryDelay(Duration.ofMillis(5000L))
+                      .setRetryDelayMultiplier(1.5)
+                      .setMaxRetryDelay(Duration.ofMillis(45000L))
+                      .setInitialRpcTimeout(Duration.ZERO)
+                      .setRpcTimeoutMultiplier(1.0)
+                      .setMaxRpcTimeout(Duration.ZERO)
+                      .setTotalTimeout(Duration.ofMillis(300000L))
+                      .build()));
+
+      return builder;
+    }
+
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
+      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
+      return this;
+    }
+
+    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
+      return unaryMethodSettingsBuilders;
+    }
+
+    /** Returns the builder for the settings used for calls to doSomething. */
+    public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
+      return doSomethingSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to doSomething. */
+    @BetaApi(
+        "The surface for use by generated code is not stable yet and may change in the future.")
+    public OperationCallSettings.Builder<
+            Request,
+            DescriptorProtos.GeneratedCodeInfo.Annotation,
+            DescriptorProtos.SourceCodeInfo.Location>
+        doSomethingOperationSettings() {
+      return doSomethingOperationSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to listLocations. */
+    public PagedCallSettings.Builder<
+            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+        listLocationsSettings() {
+      return listLocationsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to getLocation. */
+    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
+      return getLocationSettings;
+    }
+
+    @Override
+    public CollisionsStubSettings build() throws IOException {
+      return new CollisionsStubSettings(this);
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
new file mode 100644
index 0000000000..6c39ee28b5
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcCallableFactory;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC callable factory implementation for the Collisions service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class GrpcCollisionsCallableFactory implements GrpcStubCallableFactory {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createBatchingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    return GrpcCallableFactory.createOperationCallable(
+        grpcCallSettings, callSettings, clientContext, operationsStub);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createBidiStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createServerStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createClientStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
new file mode 100644
index 0000000000..04db440b44
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
@@ -0,0 +1,251 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.GrpcOperationsStub;
+import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Request;
+import io.grpc.MethodDescriptor;
+import io.grpc.protobuf.ProtoUtils;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC stub implementation for the Collisions service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class GrpcCollisionsStub extends CollisionsStub {
+  private static final MethodDescriptor<Request, Operation> doSomethingMethodDescriptor =
+      MethodDescriptor.<Request, Operation>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.showcase.v1beta1.Collisions/doSomething")
+          .setRequestMarshaller(ProtoUtils.marshaller(Request.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(Operation.getDefaultInstance()))
+          .build();
+
+  private static final MethodDescriptor<ListLocationsRequest, ListLocationsResponse>
+      listLocationsMethodDescriptor =
+          MethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.location.Locations/ListLocations")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(ListLocationsRequest.getDefaultInstance()))
+              .setResponseMarshaller(
+                  ProtoUtils.marshaller(ListLocationsResponse.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<GetLocationRequest, Location> getLocationMethodDescriptor =
+      MethodDescriptor.<GetLocationRequest, Location>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.cloud.location.Locations/GetLocation")
+          .setRequestMarshaller(ProtoUtils.marshaller(GetLocationRequest.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(Location.getDefaultInstance()))
+          .build();
+
+  private final UnaryCallable<Request, Operation> doSomethingCallable;
+  private final OperationCallable<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationCallable;
+  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
+  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable;
+  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final GrpcOperationsStub operationsStub;
+  private final GrpcStubCallableFactory callableFactory;
+
+  public static final GrpcCollisionsStub create(CollisionsStubSettings settings)
+      throws IOException {
+    return new GrpcCollisionsStub(settings, ClientContext.create(settings));
+  }
+
+  public static final GrpcCollisionsStub create(ClientContext clientContext) throws IOException {
+    return new GrpcCollisionsStub(CollisionsStubSettings.newBuilder().build(), clientContext);
+  }
+
+  public static final GrpcCollisionsStub create(
+      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
+    return new GrpcCollisionsStub(
+        CollisionsStubSettings.newBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of GrpcCollisionsStub, using the given settings. This is protected so
+   * that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcCollisionsStub(CollisionsStubSettings settings, ClientContext clientContext)
+      throws IOException {
+    this(settings, clientContext, new GrpcCollisionsCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of GrpcCollisionsStub, using the given settings. This is protected so
+   * that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcCollisionsStub(
+      CollisionsStubSettings settings,
+      ClientContext clientContext,
+      GrpcStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
+
+    GrpcCallSettings<Request, Operation> doSomethingTransportSettings =
+        GrpcCallSettings.<Request, Operation>newBuilder()
+            .setMethodDescriptor(doSomethingMethodDescriptor)
+            .build();
+    GrpcCallSettings<ListLocationsRequest, ListLocationsResponse> listLocationsTransportSettings =
+        GrpcCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+            .setMethodDescriptor(listLocationsMethodDescriptor)
+            .setParamsExtractor(
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
+                })
+            .build();
+    GrpcCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
+        GrpcCallSettings.<GetLocationRequest, Location>newBuilder()
+            .setMethodDescriptor(getLocationMethodDescriptor)
+            .setParamsExtractor(
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
+                })
+            .build();
+
+    this.doSomethingCallable =
+        callableFactory.createUnaryCallable(
+            doSomethingTransportSettings, settings.doSomethingSettings(), clientContext);
+    this.doSomethingOperationCallable =
+        callableFactory.createOperationCallable(
+            doSomethingTransportSettings,
+            settings.doSomethingOperationSettings(),
+            clientContext,
+            operationsStub);
+    this.listLocationsCallable =
+        callableFactory.createUnaryCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.listLocationsPagedCallable =
+        callableFactory.createPagedCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.getLocationCallable =
+        callableFactory.createUnaryCallable(
+            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  public GrpcOperationsStub getOperationsStub() {
+    return operationsStub;
+  }
+
+  @Override
+  public UnaryCallable<Request, Operation> doSomethingCallable() {
+    return doSomethingCallable;
+  }
+
+  @Override
+  public OperationCallable<
+          Request,
+          DescriptorProtos.GeneratedCodeInfo.Annotation,
+          DescriptorProtos.SourceCodeInfo.Location>
+      doSomethingOperationCallable() {
+    return doSomethingOperationCallable;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    return listLocationsCallable;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    return listLocationsPagedCallable;
+  }
+
+  @Override
+  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    return getLocationCallable;
+  }
+
+  @Override
+  public final void close() {
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
new file mode 100644
index 0000000000..a98141bc97
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcCallableFactory;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC callable factory implementation for the Wicked service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class GrpcWickedCallableFactory implements GrpcStubCallableFactory {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createBatchingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    return GrpcCallableFactory.createOperationCallable(
+        grpcCallSettings, callSettings, clientContext, operationsStub);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createBidiStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createServerStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createClientStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
new file mode 100644
index 0000000000..94dd0e4d01
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
@@ -0,0 +1,274 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.stub.GrpcOperationsStub;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import io.grpc.MethodDescriptor;
+import io.grpc.protobuf.ProtoUtils;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC stub implementation for the Wicked service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class GrpcWickedStub extends WickedStub {
+  private static final MethodDescriptor<EvilRequest, EvilResponse> craftEvilPlanMethodDescriptor =
+      MethodDescriptor.<EvilRequest, EvilResponse>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.showcase.v1beta1.Wicked/CraftEvilPlan")
+          .setRequestMarshaller(ProtoUtils.marshaller(EvilRequest.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(EvilResponse.getDefaultInstance()))
+          .build();
+
+  private static final MethodDescriptor<EvilRequest, EvilResponse>
+      brainstormEvilPlansMethodDescriptor =
+          MethodDescriptor.<EvilRequest, EvilResponse>newBuilder()
+              .setType(MethodDescriptor.MethodType.BIDI_STREAMING)
+              .setFullMethodName("google.showcase.v1beta1.Wicked/BrainstormEvilPlans")
+              .setRequestMarshaller(ProtoUtils.marshaller(EvilRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(EvilResponse.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<EvilRequest, EvilResponse>
+      persuadeEvilPlanMethodDescriptor =
+          MethodDescriptor.<EvilRequest, EvilResponse>newBuilder()
+              .setType(MethodDescriptor.MethodType.CLIENT_STREAMING)
+              .setFullMethodName("google.showcase.v1beta1.Wicked/PersuadeEvilPlan")
+              .setRequestMarshaller(ProtoUtils.marshaller(EvilRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(EvilResponse.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<ListLocationsRequest, ListLocationsResponse>
+      listLocationsMethodDescriptor =
+          MethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.location.Locations/ListLocations")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(ListLocationsRequest.getDefaultInstance()))
+              .setResponseMarshaller(
+                  ProtoUtils.marshaller(ListLocationsResponse.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<GetLocationRequest, Location> getLocationMethodDescriptor =
+      MethodDescriptor.<GetLocationRequest, Location>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.cloud.location.Locations/GetLocation")
+          .setRequestMarshaller(ProtoUtils.marshaller(GetLocationRequest.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(Location.getDefaultInstance()))
+          .build();
+
+  private final UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable;
+  private final BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable;
+  private final ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable;
+  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
+  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable;
+  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final GrpcOperationsStub operationsStub;
+  private final GrpcStubCallableFactory callableFactory;
+
+  public static final GrpcWickedStub create(WickedStubSettings settings) throws IOException {
+    return new GrpcWickedStub(settings, ClientContext.create(settings));
+  }
+
+  public static final GrpcWickedStub create(ClientContext clientContext) throws IOException {
+    return new GrpcWickedStub(WickedStubSettings.newBuilder().build(), clientContext);
+  }
+
+  public static final GrpcWickedStub create(
+      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
+    return new GrpcWickedStub(
+        WickedStubSettings.newBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of GrpcWickedStub, using the given settings. This is protected so that
+   * it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
+   */
+  protected GrpcWickedStub(WickedStubSettings settings, ClientContext clientContext)
+      throws IOException {
+    this(settings, clientContext, new GrpcWickedCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of GrpcWickedStub, using the given settings. This is protected so that
+   * it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
+   */
+  protected GrpcWickedStub(
+      WickedStubSettings settings,
+      ClientContext clientContext,
+      GrpcStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
+
+    GrpcCallSettings<EvilRequest, EvilResponse> craftEvilPlanTransportSettings =
+        GrpcCallSettings.<EvilRequest, EvilResponse>newBuilder()
+            .setMethodDescriptor(craftEvilPlanMethodDescriptor)
+            .build();
+    GrpcCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansTransportSettings =
+        GrpcCallSettings.<EvilRequest, EvilResponse>newBuilder()
+            .setMethodDescriptor(brainstormEvilPlansMethodDescriptor)
+            .build();
+    GrpcCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanTransportSettings =
+        GrpcCallSettings.<EvilRequest, EvilResponse>newBuilder()
+            .setMethodDescriptor(persuadeEvilPlanMethodDescriptor)
+            .build();
+    GrpcCallSettings<ListLocationsRequest, ListLocationsResponse> listLocationsTransportSettings =
+        GrpcCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+            .setMethodDescriptor(listLocationsMethodDescriptor)
+            .setParamsExtractor(
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
+                })
+            .build();
+    GrpcCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
+        GrpcCallSettings.<GetLocationRequest, Location>newBuilder()
+            .setMethodDescriptor(getLocationMethodDescriptor)
+            .setParamsExtractor(
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
+                })
+            .build();
+
+    this.craftEvilPlanCallable =
+        callableFactory.createUnaryCallable(
+            craftEvilPlanTransportSettings, settings.craftEvilPlanSettings(), clientContext);
+    this.brainstormEvilPlansCallable =
+        callableFactory.createBidiStreamingCallable(
+            brainstormEvilPlansTransportSettings,
+            settings.brainstormEvilPlansSettings(),
+            clientContext);
+    this.persuadeEvilPlanCallable =
+        callableFactory.createClientStreamingCallable(
+            persuadeEvilPlanTransportSettings, settings.persuadeEvilPlanSettings(), clientContext);
+    this.listLocationsCallable =
+        callableFactory.createUnaryCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.listLocationsPagedCallable =
+        callableFactory.createPagedCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.getLocationCallable =
+        callableFactory.createUnaryCallable(
+            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  public GrpcOperationsStub getOperationsStub() {
+    return operationsStub;
+  }
+
+  @Override
+  public UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
+    return craftEvilPlanCallable;
+  }
+
+  @Override
+  public BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
+    return brainstormEvilPlansCallable;
+  }
+
+  @Override
+  public ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
+    return persuadeEvilPlanCallable;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    return listLocationsCallable;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    return listLocationsPagedCallable;
+  }
+
+  @Override
+  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    return getLocationCallable;
+  }
+
+  @Override
+  public final void close() {
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
new file mode 100644
index 0000000000..749d6cd828
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.httpjson.HttpJsonCallSettings;
+import com.google.api.gax.httpjson.HttpJsonCallableFactory;
+import com.google.api.gax.httpjson.HttpJsonOperationSnapshotCallable;
+import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
+import com.google.api.gax.httpjson.longrunning.stub.OperationsStub;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * REST callable factory implementation for the Collisions service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class HttpJsonCollisionsCallableFactory
+    implements HttpJsonStubCallableFactory<Operation, OperationsStub> {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return HttpJsonCallableFactory.createUnaryCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return HttpJsonCallableFactory.createPagedCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return HttpJsonCallableFactory.createBatchingCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+
+  @BetaApi(
+      "The surface for long-running operations is not stable yet and may change in the future.")
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          HttpJsonCallSettings<RequestT, Operation> httpJsonCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    UnaryCallable<RequestT, Operation> innerCallable =
+        HttpJsonCallableFactory.createBaseUnaryCallable(
+            httpJsonCallSettings, callSettings.getInitialCallSettings(), clientContext);
+    HttpJsonOperationSnapshotCallable<RequestT, Operation> initialCallable =
+        new HttpJsonOperationSnapshotCallable<RequestT, Operation>(
+            innerCallable,
+            httpJsonCallSettings.getMethodDescriptor().getOperationSnapshotFactory());
+    return HttpJsonCallableFactory.createOperationCallable(
+        callSettings, clientContext, operationsStub.longRunningClient(), initialCallable);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return HttpJsonCallableFactory.createServerStreamingCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
new file mode 100644
index 0000000000..58d397e5bb
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
@@ -0,0 +1,295 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.HttpRule;
+import com.google.api.core.BetaApi;
+import com.google.api.core.InternalApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.httpjson.ApiMethodDescriptor;
+import com.google.api.gax.httpjson.HttpJsonCallSettings;
+import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
+import com.google.api.gax.httpjson.ProtoMessageRequestFormatter;
+import com.google.api.gax.httpjson.ProtoMessageResponseParser;
+import com.google.api.gax.httpjson.ProtoRestSerializer;
+import com.google.api.gax.httpjson.longrunning.stub.HttpJsonOperationsStub;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.Operation;
+import com.google.protobuf.DescriptorProtos;
+import com.google.protobuf.TypeRegistry;
+import com.google.showcase.v1beta1.Request;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * REST stub implementation for the Collisions service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class HttpJsonCollisionsStub extends CollisionsStub {
+  private static final TypeRegistry typeRegistry =
+      TypeRegistry.newBuilder()
+          .add(DescriptorProtos.GeneratedCodeInfo.Annotation.getDescriptor())
+          .add(DescriptorProtos.SourceCodeInfo.Location.getDescriptor())
+          .build();
+
+  private static final ApiMethodDescriptor<ListLocationsRequest, ListLocationsResponse>
+      listLocationsMethodDescriptor =
+          ApiMethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+              .setFullMethodName("google.cloud.location.Locations/ListLocations")
+              .setHttpMethod("GET")
+              .setType(ApiMethodDescriptor.MethodType.UNARY)
+              .setRequestFormatter(
+                  ProtoMessageRequestFormatter.<ListLocationsRequest>newBuilder()
+                      .setPath(
+                          "/v1beta1/{name=projects/*}/locations",
+                          request -> {
+                            Map<String, String> fields = new HashMap<>();
+                            ProtoRestSerializer<ListLocationsRequest> serializer =
+                                ProtoRestSerializer.create();
+                            serializer.putPathParam(fields, "name", request.getName());
+                            return fields;
+                          })
+                      .setQueryParamsExtractor(
+                          request -> {
+                            Map<String, List<String>> fields = new HashMap<>();
+                            ProtoRestSerializer<ListLocationsRequest> serializer =
+                                ProtoRestSerializer.create();
+                            return fields;
+                          })
+                      .setRequestBodyExtractor(request -> null)
+                      .build())
+              .setResponseParser(
+                  ProtoMessageResponseParser.<ListLocationsResponse>newBuilder()
+                      .setDefaultInstance(ListLocationsResponse.getDefaultInstance())
+                      .setDefaultTypeRegistry(typeRegistry)
+                      .build())
+              .build();
+
+  private static final ApiMethodDescriptor<GetLocationRequest, Location>
+      getLocationMethodDescriptor =
+          ApiMethodDescriptor.<GetLocationRequest, Location>newBuilder()
+              .setFullMethodName("google.cloud.location.Locations/GetLocation")
+              .setHttpMethod("GET")
+              .setType(ApiMethodDescriptor.MethodType.UNARY)
+              .setRequestFormatter(
+                  ProtoMessageRequestFormatter.<GetLocationRequest>newBuilder()
+                      .setPath(
+                          "/v1beta1/{name=projects/*/locations/*}",
+                          request -> {
+                            Map<String, String> fields = new HashMap<>();
+                            ProtoRestSerializer<GetLocationRequest> serializer =
+                                ProtoRestSerializer.create();
+                            serializer.putPathParam(fields, "name", request.getName());
+                            return fields;
+                          })
+                      .setQueryParamsExtractor(
+                          request -> {
+                            Map<String, List<String>> fields = new HashMap<>();
+                            ProtoRestSerializer<GetLocationRequest> serializer =
+                                ProtoRestSerializer.create();
+                            return fields;
+                          })
+                      .setRequestBodyExtractor(request -> null)
+                      .build())
+              .setResponseParser(
+                  ProtoMessageResponseParser.<Location>newBuilder()
+                      .setDefaultInstance(Location.getDefaultInstance())
+                      .setDefaultTypeRegistry(typeRegistry)
+                      .build())
+              .build();
+
+  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
+  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable;
+  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final HttpJsonOperationsStub httpJsonOperationsStub;
+  private final HttpJsonStubCallableFactory callableFactory;
+
+  public static final HttpJsonCollisionsStub create(CollisionsStubSettings settings)
+      throws IOException {
+    return new HttpJsonCollisionsStub(settings, ClientContext.create(settings));
+  }
+
+  public static final HttpJsonCollisionsStub create(ClientContext clientContext)
+      throws IOException {
+    return new HttpJsonCollisionsStub(
+        CollisionsStubSettings.newHttpJsonBuilder().build(), clientContext);
+  }
+
+  public static final HttpJsonCollisionsStub create(
+      ClientContext clientContext, HttpJsonStubCallableFactory callableFactory) throws IOException {
+    return new HttpJsonCollisionsStub(
+        CollisionsStubSettings.newHttpJsonBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of HttpJsonCollisionsStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected HttpJsonCollisionsStub(CollisionsStubSettings settings, ClientContext clientContext)
+      throws IOException {
+    this(settings, clientContext, new HttpJsonCollisionsCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of HttpJsonCollisionsStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected HttpJsonCollisionsStub(
+      CollisionsStubSettings settings,
+      ClientContext clientContext,
+      HttpJsonStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.httpJsonOperationsStub =
+        HttpJsonOperationsStub.create(
+            clientContext,
+            callableFactory,
+            typeRegistry,
+            ImmutableMap.<String, HttpRule>builder()
+                .put(
+                    "google.longrunning.Operations.CancelOperation",
+                    HttpRule.newBuilder().setPost("/v1beta1/{name=operations/**}:cancel").build())
+                .put(
+                    "google.longrunning.Operations.DeleteOperation",
+                    HttpRule.newBuilder().setDelete("/v1beta1/{name=operations/**}").build())
+                .put(
+                    "google.longrunning.Operations.GetOperation",
+                    HttpRule.newBuilder().setGet("/v1beta1/{name=operations/**}").build())
+                .put(
+                    "google.longrunning.Operations.ListOperations",
+                    HttpRule.newBuilder().setGet("/v1beta1/operations").build())
+                .build());
+
+    HttpJsonCallSettings<ListLocationsRequest, ListLocationsResponse>
+        listLocationsTransportSettings =
+            HttpJsonCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+                .setMethodDescriptor(listLocationsMethodDescriptor)
+                .setTypeRegistry(typeRegistry)
+                .build();
+    HttpJsonCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
+        HttpJsonCallSettings.<GetLocationRequest, Location>newBuilder()
+            .setMethodDescriptor(getLocationMethodDescriptor)
+            .setTypeRegistry(typeRegistry)
+            .build();
+
+    this.listLocationsCallable =
+        callableFactory.createUnaryCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.listLocationsPagedCallable =
+        callableFactory.createPagedCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.getLocationCallable =
+        callableFactory.createUnaryCallable(
+            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  @InternalApi
+  public static List<ApiMethodDescriptor> getMethodDescriptors() {
+    List<ApiMethodDescriptor> methodDescriptors = new ArrayList<>();
+    methodDescriptors.add(listLocationsMethodDescriptor);
+    methodDescriptors.add(getLocationMethodDescriptor);
+    return methodDescriptors;
+  }
+
+  public HttpJsonOperationsStub getHttpJsonOperationsStub() {
+    return httpJsonOperationsStub;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    return listLocationsCallable;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    return listLocationsPagedCallable;
+  }
+
+  @Override
+  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    return getLocationCallable;
+  }
+
+  @Override
+  public UnaryCallable<Request, Operation> doSomethingCallable() {
+    throw new UnsupportedOperationException(
+        "Not implemented: doSomethingCallable(). REST transport is not implemented for this method yet.");
+  }
+
+  @Override
+  public final void close() {
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
new file mode 100644
index 0000000000..16dde24678
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.httpjson.HttpJsonCallSettings;
+import com.google.api.gax.httpjson.HttpJsonCallableFactory;
+import com.google.api.gax.httpjson.HttpJsonOperationSnapshotCallable;
+import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
+import com.google.api.gax.httpjson.longrunning.stub.OperationsStub;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * REST callable factory implementation for the Wicked service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class HttpJsonWickedCallableFactory
+    implements HttpJsonStubCallableFactory<Operation, OperationsStub> {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return HttpJsonCallableFactory.createUnaryCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return HttpJsonCallableFactory.createPagedCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return HttpJsonCallableFactory.createBatchingCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+
+  @BetaApi(
+      "The surface for long-running operations is not stable yet and may change in the future.")
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          HttpJsonCallSettings<RequestT, Operation> httpJsonCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    UnaryCallable<RequestT, Operation> innerCallable =
+        HttpJsonCallableFactory.createBaseUnaryCallable(
+            httpJsonCallSettings, callSettings.getInitialCallSettings(), clientContext);
+    HttpJsonOperationSnapshotCallable<RequestT, Operation> initialCallable =
+        new HttpJsonOperationSnapshotCallable<RequestT, Operation>(
+            innerCallable,
+            httpJsonCallSettings.getMethodDescriptor().getOperationSnapshotFactory());
+    return HttpJsonCallableFactory.createOperationCallable(
+        callSettings, clientContext, operationsStub.longRunningClient(), initialCallable);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return HttpJsonCallableFactory.createServerStreamingCallable(
+        httpJsonCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
new file mode 100644
index 0000000000..78e03df937
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
@@ -0,0 +1,274 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.core.BetaApi;
+import com.google.api.core.InternalApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.httpjson.ApiMethodDescriptor;
+import com.google.api.gax.httpjson.HttpJsonCallSettings;
+import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
+import com.google.api.gax.httpjson.ProtoMessageRequestFormatter;
+import com.google.api.gax.httpjson.ProtoMessageResponseParser;
+import com.google.api.gax.httpjson.ProtoRestSerializer;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.protobuf.TypeRegistry;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * REST stub implementation for the Wicked service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class HttpJsonWickedStub extends WickedStub {
+  private static final TypeRegistry typeRegistry = TypeRegistry.newBuilder().build();
+
+  private static final ApiMethodDescriptor<ListLocationsRequest, ListLocationsResponse>
+      listLocationsMethodDescriptor =
+          ApiMethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+              .setFullMethodName("google.cloud.location.Locations/ListLocations")
+              .setHttpMethod("GET")
+              .setType(ApiMethodDescriptor.MethodType.UNARY)
+              .setRequestFormatter(
+                  ProtoMessageRequestFormatter.<ListLocationsRequest>newBuilder()
+                      .setPath(
+                          "/v1beta1/{name=projects/*}/locations",
+                          request -> {
+                            Map<String, String> fields = new HashMap<>();
+                            ProtoRestSerializer<ListLocationsRequest> serializer =
+                                ProtoRestSerializer.create();
+                            serializer.putPathParam(fields, "name", request.getName());
+                            return fields;
+                          })
+                      .setQueryParamsExtractor(
+                          request -> {
+                            Map<String, List<String>> fields = new HashMap<>();
+                            ProtoRestSerializer<ListLocationsRequest> serializer =
+                                ProtoRestSerializer.create();
+                            return fields;
+                          })
+                      .setRequestBodyExtractor(request -> null)
+                      .build())
+              .setResponseParser(
+                  ProtoMessageResponseParser.<ListLocationsResponse>newBuilder()
+                      .setDefaultInstance(ListLocationsResponse.getDefaultInstance())
+                      .setDefaultTypeRegistry(typeRegistry)
+                      .build())
+              .build();
+
+  private static final ApiMethodDescriptor<GetLocationRequest, Location>
+      getLocationMethodDescriptor =
+          ApiMethodDescriptor.<GetLocationRequest, Location>newBuilder()
+              .setFullMethodName("google.cloud.location.Locations/GetLocation")
+              .setHttpMethod("GET")
+              .setType(ApiMethodDescriptor.MethodType.UNARY)
+              .setRequestFormatter(
+                  ProtoMessageRequestFormatter.<GetLocationRequest>newBuilder()
+                      .setPath(
+                          "/v1beta1/{name=projects/*/locations/*}",
+                          request -> {
+                            Map<String, String> fields = new HashMap<>();
+                            ProtoRestSerializer<GetLocationRequest> serializer =
+                                ProtoRestSerializer.create();
+                            serializer.putPathParam(fields, "name", request.getName());
+                            return fields;
+                          })
+                      .setQueryParamsExtractor(
+                          request -> {
+                            Map<String, List<String>> fields = new HashMap<>();
+                            ProtoRestSerializer<GetLocationRequest> serializer =
+                                ProtoRestSerializer.create();
+                            return fields;
+                          })
+                      .setRequestBodyExtractor(request -> null)
+                      .build())
+              .setResponseParser(
+                  ProtoMessageResponseParser.<Location>newBuilder()
+                      .setDefaultInstance(Location.getDefaultInstance())
+                      .setDefaultTypeRegistry(typeRegistry)
+                      .build())
+              .build();
+
+  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
+  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable;
+  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final HttpJsonStubCallableFactory callableFactory;
+
+  public static final HttpJsonWickedStub create(WickedStubSettings settings) throws IOException {
+    return new HttpJsonWickedStub(settings, ClientContext.create(settings));
+  }
+
+  public static final HttpJsonWickedStub create(ClientContext clientContext) throws IOException {
+    return new HttpJsonWickedStub(WickedStubSettings.newHttpJsonBuilder().build(), clientContext);
+  }
+
+  public static final HttpJsonWickedStub create(
+      ClientContext clientContext, HttpJsonStubCallableFactory callableFactory) throws IOException {
+    return new HttpJsonWickedStub(
+        WickedStubSettings.newHttpJsonBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of HttpJsonWickedStub, using the given settings. This is protected so
+   * that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected HttpJsonWickedStub(WickedStubSettings settings, ClientContext clientContext)
+      throws IOException {
+    this(settings, clientContext, new HttpJsonWickedCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of HttpJsonWickedStub, using the given settings. This is protected so
+   * that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected HttpJsonWickedStub(
+      WickedStubSettings settings,
+      ClientContext clientContext,
+      HttpJsonStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+
+    HttpJsonCallSettings<ListLocationsRequest, ListLocationsResponse>
+        listLocationsTransportSettings =
+            HttpJsonCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
+                .setMethodDescriptor(listLocationsMethodDescriptor)
+                .setTypeRegistry(typeRegistry)
+                .build();
+    HttpJsonCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
+        HttpJsonCallSettings.<GetLocationRequest, Location>newBuilder()
+            .setMethodDescriptor(getLocationMethodDescriptor)
+            .setTypeRegistry(typeRegistry)
+            .build();
+
+    this.listLocationsCallable =
+        callableFactory.createUnaryCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.listLocationsPagedCallable =
+        callableFactory.createPagedCallable(
+            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
+    this.getLocationCallable =
+        callableFactory.createUnaryCallable(
+            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  @InternalApi
+  public static List<ApiMethodDescriptor> getMethodDescriptors() {
+    List<ApiMethodDescriptor> methodDescriptors = new ArrayList<>();
+    methodDescriptors.add(listLocationsMethodDescriptor);
+    methodDescriptors.add(getLocationMethodDescriptor);
+    return methodDescriptors;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    return listLocationsCallable;
+  }
+
+  @Override
+  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    return listLocationsPagedCallable;
+  }
+
+  @Override
+  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    return getLocationCallable;
+  }
+
+  @Override
+  public UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
+    throw new UnsupportedOperationException(
+        "Not implemented: craftEvilPlanCallable(). REST transport is not implemented for this method yet.");
+  }
+
+  @Override
+  public BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
+    throw new UnsupportedOperationException(
+        "Not implemented: brainstormEvilPlansCallable(). REST transport is not implemented for this method yet.");
+  }
+
+  @Override
+  public ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
+    throw new UnsupportedOperationException(
+        "Not implemented: persuadeEvilPlanCallable(). REST transport is not implemented for this method yet.");
+  }
+
+  @Override
+  public final void close() {
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
new file mode 100644
index 0000000000..cd9f5d2fee
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Base stub class for the Wicked service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public abstract class WickedStub implements BackgroundResource {
+
+  public UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
+    throw new UnsupportedOperationException("Not implemented: craftEvilPlanCallable()");
+  }
+
+  public BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
+    throw new UnsupportedOperationException("Not implemented: brainstormEvilPlansCallable()");
+  }
+
+  public ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
+    throw new UnsupportedOperationException("Not implemented: persuadeEvilPlanCallable()");
+  }
+
+  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
+      listLocationsPagedCallable() {
+    throw new UnsupportedOperationException("Not implemented: listLocationsPagedCallable()");
+  }
+
+  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
+    throw new UnsupportedOperationException("Not implemented: listLocationsCallable()");
+  }
+
+  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+    throw new UnsupportedOperationException("Not implemented: getLocationCallable()");
+  }
+
+  @Override
+  public abstract void close();
+}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
new file mode 100644
index 0000000000..4f0d92cd66
--- /dev/null
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
@@ -0,0 +1,458 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1.stub;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.ApiFuture;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GaxProperties;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.GrpcTransportChannel;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.GaxHttpJsonProperties;
+import com.google.api.gax.httpjson.HttpJsonTransportChannel;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
+import com.google.api.gax.retrying.RetrySettings;
+import com.google.api.gax.rpc.ApiCallContext;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.PageContext;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.PagedListDescriptor;
+import com.google.api.gax.rpc.PagedListResponseFactory;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.showcase.v1beta1.EvilRequest;
+import com.google.showcase.v1beta1.EvilResponse;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link WickedStub}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (localhost) and default port (7469) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of craftEvilPlan to 30 seconds:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * WickedStubSettings.Builder wickedSettingsBuilder = WickedStubSettings.newBuilder();
+ * wickedSettingsBuilder
+ *     .craftEvilPlanSettings()
+ *     .setRetrySettings(
+ *         wickedSettingsBuilder
+ *             .craftEvilPlanSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * WickedStubSettings wickedSettings = wickedSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class WickedStubSettings extends StubSettings<WickedStubSettings> {
+  /** The default scopes of the service. */
+  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
+      ImmutableList.<String>builder().build();
+
+  private final UnaryCallSettings<EvilRequest, EvilResponse> craftEvilPlanSettings;
+  private final StreamingCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansSettings;
+  private final StreamingCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanSettings;
+  private final PagedCallSettings<
+          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      listLocationsSettings;
+  private final UnaryCallSettings<GetLocationRequest, Location> getLocationSettings;
+
+  private static final PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>
+      LIST_LOCATIONS_PAGE_STR_DESC =
+          new PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>() {
+            @Override
+            public String emptyToken() {
+              return "";
+            }
+
+            @Override
+            public ListLocationsRequest injectToken(ListLocationsRequest payload, String token) {
+              return ListLocationsRequest.newBuilder(payload).setPageToken(token).build();
+            }
+
+            @Override
+            public ListLocationsRequest injectPageSize(ListLocationsRequest payload, int pageSize) {
+              return ListLocationsRequest.newBuilder(payload).setPageSize(pageSize).build();
+            }
+
+            @Override
+            public Integer extractPageSize(ListLocationsRequest payload) {
+              return payload.getPageSize();
+            }
+
+            @Override
+            public String extractNextToken(ListLocationsResponse payload) {
+              return payload.getNextPageToken();
+            }
+
+            @Override
+            public Iterable<Location> extractResources(ListLocationsResponse payload) {
+              return payload.getLocationsList() == null
+                  ? ImmutableList.<Location>of()
+                  : payload.getLocationsList();
+            }
+          };
+
+  private static final PagedListResponseFactory<
+          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      LIST_LOCATIONS_PAGE_STR_FACT =
+          new PagedListResponseFactory<
+              ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>() {
+            @Override
+            public ApiFuture<ListLocationsPagedResponse> getFuturePagedResponse(
+                UnaryCallable<ListLocationsRequest, ListLocationsResponse> callable,
+                ListLocationsRequest request,
+                ApiCallContext context,
+                ApiFuture<ListLocationsResponse> futureResponse) {
+              PageContext<ListLocationsRequest, ListLocationsResponse, Location> pageContext =
+                  PageContext.create(callable, LIST_LOCATIONS_PAGE_STR_DESC, request, context);
+              return ListLocationsPagedResponse.createAsync(pageContext, futureResponse);
+            }
+          };
+
+  /** Returns the object with the settings used for calls to craftEvilPlan. */
+  public UnaryCallSettings<EvilRequest, EvilResponse> craftEvilPlanSettings() {
+    return craftEvilPlanSettings;
+  }
+
+  /** Returns the object with the settings used for calls to brainstormEvilPlans. */
+  public StreamingCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
+    return brainstormEvilPlansSettings;
+  }
+
+  /** Returns the object with the settings used for calls to persuadeEvilPlan. */
+  public StreamingCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
+    return persuadeEvilPlanSettings;
+  }
+
+  /** Returns the object with the settings used for calls to listLocations. */
+  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+      listLocationsSettings() {
+    return listLocationsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to getLocation. */
+  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
+    return getLocationSettings;
+  }
+
+  public WickedStub createStub() throws IOException {
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(GrpcTransportChannel.getGrpcTransportName())) {
+      return GrpcWickedStub.create(this);
+    }
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(HttpJsonTransportChannel.getHttpJsonTransportName())) {
+      return HttpJsonWickedStub.create(this);
+    }
+    throw new UnsupportedOperationException(
+        String.format(
+            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return InstantiatingExecutorProvider.newBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return "localhost:7469";
+  }
+
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "localhost:7469";
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return DEFAULT_SERVICE_SCOPES;
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return GoogleCredentialsProvider.newBuilder()
+        .setScopesToApply(DEFAULT_SERVICE_SCOPES)
+        .setUseJwtAccessWithScope(true);
+  }
+
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return InstantiatingGrpcChannelProvider.newBuilder()
+        .setMaxInboundMessageSize(Integer.MAX_VALUE);
+  }
+
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return InstantiatingHttpJsonChannelProvider.newBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return defaultGrpcTransportProviderBuilder().build();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultGrpcApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken("gapic", GaxProperties.getLibraryVersion(WickedStubSettings.class))
+        .setTransportToken(
+            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultHttpJsonApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken("gapic", GaxProperties.getLibraryVersion(WickedStubSettings.class))
+        .setTransportToken(
+            GaxHttpJsonProperties.getHttpJsonTokenName(),
+            GaxHttpJsonProperties.getHttpJsonVersion());
+  }
+
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return WickedStubSettings.defaultGrpcApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new gRPC builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new REST builder for this class. */
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected WickedStubSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+
+    craftEvilPlanSettings = settingsBuilder.craftEvilPlanSettings().build();
+    brainstormEvilPlansSettings = settingsBuilder.brainstormEvilPlansSettings().build();
+    persuadeEvilPlanSettings = settingsBuilder.persuadeEvilPlanSettings().build();
+    listLocationsSettings = settingsBuilder.listLocationsSettings().build();
+    getLocationSettings = settingsBuilder.getLocationSettings().build();
+  }
+
+  /** Builder for WickedStubSettings. */
+  public static class Builder extends StubSettings.Builder<WickedStubSettings, Builder> {
+    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
+    private final UnaryCallSettings.Builder<EvilRequest, EvilResponse> craftEvilPlanSettings;
+    private final StreamingCallSettings.Builder<EvilRequest, EvilResponse>
+        brainstormEvilPlansSettings;
+    private final StreamingCallSettings.Builder<EvilRequest, EvilResponse> persuadeEvilPlanSettings;
+    private final PagedCallSettings.Builder<
+            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+        listLocationsSettings;
+    private final UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings;
+    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
+        RETRYABLE_CODE_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
+          ImmutableMap.builder();
+      definitions.put("no_retry_codes", ImmutableSet.copyOf(Lists.<StatusCode.Code>newArrayList()));
+      RETRYABLE_CODE_DEFINITIONS = definitions.build();
+    }
+
+    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
+      RetrySettings settings = null;
+      settings = RetrySettings.newBuilder().setRpcTimeoutMultiplier(1.0).build();
+      definitions.put("no_retry_params", settings);
+      RETRY_PARAM_DEFINITIONS = definitions.build();
+    }
+
+    protected Builder() {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(clientContext);
+
+      craftEvilPlanSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      brainstormEvilPlansSettings = StreamingCallSettings.newBuilder();
+      persuadeEvilPlanSettings = StreamingCallSettings.newBuilder();
+      listLocationsSettings = PagedCallSettings.newBuilder(LIST_LOCATIONS_PAGE_STR_FACT);
+      getLocationSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              craftEvilPlanSettings, listLocationsSettings, getLocationSettings);
+      initDefaults(this);
+    }
+
+    protected Builder(WickedStubSettings settings) {
+      super(settings);
+
+      craftEvilPlanSettings = settings.craftEvilPlanSettings.toBuilder();
+      brainstormEvilPlansSettings = settings.brainstormEvilPlansSettings.toBuilder();
+      persuadeEvilPlanSettings = settings.persuadeEvilPlanSettings.toBuilder();
+      listLocationsSettings = settings.listLocationsSettings.toBuilder();
+      getLocationSettings = settings.getLocationSettings.toBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              craftEvilPlanSettings, listLocationsSettings, getLocationSettings);
+    }
+
+    private static Builder createDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultTransportChannelProvider());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
+
+      return initDefaults(builder);
+    }
+
+    private static Builder createHttpJsonDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
+
+      return initDefaults(builder);
+    }
+
+    private static Builder initDefaults(Builder builder) {
+      builder
+          .craftEvilPlanSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+
+      builder
+          .listLocationsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+
+      builder
+          .getLocationSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+
+      return builder;
+    }
+
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
+      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
+      return this;
+    }
+
+    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
+      return unaryMethodSettingsBuilders;
+    }
+
+    /** Returns the builder for the settings used for calls to craftEvilPlan. */
+    public UnaryCallSettings.Builder<EvilRequest, EvilResponse> craftEvilPlanSettings() {
+      return craftEvilPlanSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to brainstormEvilPlans. */
+    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
+      return brainstormEvilPlansSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to persuadeEvilPlan. */
+    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
+      return persuadeEvilPlanSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to listLocations. */
+    public PagedCallSettings.Builder<
+            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
+        listLocationsSettings() {
+      return listLocationsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to getLocation. */
+    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
+      return getLocationSettings;
+    }
+
+    @Override
+    public WickedStubSettings build() throws IOException {
+      return new WickedStubSettings(this);
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
new file mode 100644
index 0000000000..8b3d33fd56
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.httpjson.GaxHttpJsonProperties;
+import com.google.api.gax.httpjson.testing.MockHttpService;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ApiException;
+import com.google.api.gax.rpc.ApiExceptionFactory;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.testing.FakeStatusCode;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.Lists;
+import com.google.protobuf.Any;
+import com.google.showcase.v1beta1.stub.HttpJsonCollisionsStub;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class CollisionsClientHttpJsonTest {
+  private static MockHttpService mockService;
+  private static CollisionsClient client;
+
+  @BeforeClass
+  public static void startStaticServer() throws IOException {
+    mockService =
+        new MockHttpService(
+            HttpJsonCollisionsStub.getMethodDescriptors(), CollisionsSettings.getDefaultEndpoint());
+    CollisionsSettings settings =
+        CollisionsSettings.newHttpJsonBuilder()
+            .setTransportChannelProvider(
+                CollisionsSettings.defaultHttpJsonTransportProviderBuilder()
+                    .setHttpTransport(mockService)
+                    .build())
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = CollisionsClient.create(settings);
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    client.close();
+  }
+
+  @Before
+  public void setUp() {}
+
+  @After
+  public void tearDown() throws Exception {
+    mockService.reset();
+  }
+
+  @Test
+  public void doSomethingUnsupportedMethodTest() throws Exception {
+    // The doSomething() method is not supported in REST transport.
+    // This empty test is generated for technical reasons.
+  }
+
+  @Test
+  public void listLocationsTest() throws Exception {
+    Location responsesElement = Location.newBuilder().build();
+    ListLocationsResponse expectedResponse =
+        ListLocationsResponse.newBuilder()
+            .setNextPageToken("")
+            .addAllLocations(Arrays.asList(responsesElement))
+            .build();
+    mockService.addResponse(expectedResponse);
+
+    ListLocationsRequest request =
+        ListLocationsRequest.newBuilder()
+            .setName("projects/project-3664")
+            .setFilter("filter-1274492040")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+
+    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
+
+    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
+
+    Assert.assertEquals(1, resources.size());
+    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
+
+    List<String> actualRequests = mockService.getRequestPaths();
+    Assert.assertEquals(1, actualRequests.size());
+
+    String apiClientHeaderKey =
+        mockService
+            .getRequestHeaders()
+            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
+            .iterator()
+            .next();
+    Assert.assertTrue(
+        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
+            .matcher(apiClientHeaderKey)
+            .matches());
+  }
+
+  @Test
+  public void listLocationsExceptionTest() throws Exception {
+    ApiException exception =
+        ApiExceptionFactory.createException(
+            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
+    mockService.addException(exception);
+
+    try {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("projects/project-3664")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      client.listLocations(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void getLocationTest() throws Exception {
+    Location expectedResponse =
+        Location.newBuilder()
+            .setName("name3373707")
+            .setLocationId("locationId1541836720")
+            .setDisplayName("displayName1714148973")
+            .putAllLabels(new HashMap<String, String>())
+            .setMetadata(Any.newBuilder().build())
+            .build();
+    mockService.addResponse(expectedResponse);
+
+    GetLocationRequest request =
+        GetLocationRequest.newBuilder()
+            .setName("projects/project-9062/locations/location-9062")
+            .build();
+
+    Location actualResponse = client.getLocation(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<String> actualRequests = mockService.getRequestPaths();
+    Assert.assertEquals(1, actualRequests.size());
+
+    String apiClientHeaderKey =
+        mockService
+            .getRequestHeaders()
+            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
+            .iterator()
+            .next();
+    Assert.assertTrue(
+        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
+            .matcher(apiClientHeaderKey)
+            .matches());
+  }
+
+  @Test
+  public void getLocationExceptionTest() throws Exception {
+    ApiException exception =
+        ApiExceptionFactory.createException(
+            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
+    mockService.addException(exception);
+
+    try {
+      GetLocationRequest request =
+          GetLocationRequest.newBuilder()
+              .setName("projects/project-9062/locations/location-9062")
+              .build();
+      client.getLocation(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
new file mode 100644
index 0000000000..8c0876664f
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
@@ -0,0 +1,257 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.testing.LocalChannelProvider;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.api.gax.grpc.testing.MockServiceHelper;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.Lists;
+import com.google.longrunning.Operation;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.Any;
+import com.google.protobuf.DescriptorProtos;
+import io.grpc.StatusRuntimeException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class CollisionsClientTest {
+  private static MockCollisions mockCollisions;
+  private static MockLocations mockLocations;
+  private static MockServiceHelper mockServiceHelper;
+  private LocalChannelProvider channelProvider;
+  private CollisionsClient client;
+
+  @BeforeClass
+  public static void startStaticServer() {
+    mockCollisions = new MockCollisions();
+    mockLocations = new MockLocations();
+    mockServiceHelper =
+        new MockServiceHelper(
+            UUID.randomUUID().toString(),
+            Arrays.<MockGrpcService>asList(mockCollisions, mockLocations));
+    mockServiceHelper.start();
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    mockServiceHelper.stop();
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    mockServiceHelper.reset();
+    channelProvider = mockServiceHelper.createChannelProvider();
+    CollisionsSettings settings =
+        CollisionsSettings.newBuilder()
+            .setTransportChannelProvider(channelProvider)
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = CollisionsClient.create(settings);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    client.close();
+  }
+
+  @Test
+  public void doSomethingTest() throws Exception {
+    DescriptorProtos.GeneratedCodeInfo.Annotation expectedResponse =
+        DescriptorProtos.GeneratedCodeInfo.Annotation.newBuilder()
+            .addAllPath(new ArrayList<Integer>())
+            .setSourceFile("sourceFile-1111864265")
+            .setBegin(93616297)
+            .setEnd(100571)
+            .build();
+    Operation resultOperation =
+        Operation.newBuilder()
+            .setName("doSomethingTest")
+            .setDone(true)
+            .setResponse(Any.pack(expectedResponse))
+            .build();
+    mockCollisions.addResponse(resultOperation);
+
+    Request request =
+        Request.newBuilder()
+            .setName("name3373707")
+            .setAnnotation(Annotation.newBuilder().build())
+            .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
+            .build();
+
+    DescriptorProtos.GeneratedCodeInfo.Annotation actualResponse =
+        client.doSomethingAsync(request).get();
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockCollisions.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    Request actualRequest = ((Request) actualRequests.get(0));
+
+    Assert.assertEquals(request.getName(), actualRequest.getName());
+    Assert.assertEquals(request.getAnnotation(), actualRequest.getAnnotation());
+    Assert.assertEquals(request.getLocation(), actualRequest.getLocation());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void doSomethingExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockCollisions.addException(exception);
+
+    try {
+      Request request =
+          Request.newBuilder()
+              .setName("name3373707")
+              .setAnnotation(Annotation.newBuilder().build())
+              .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
+              .build();
+      client.doSomethingAsync(request).get();
+      Assert.fail("No exception raised");
+    } catch (ExecutionException e) {
+      Assert.assertEquals(InvalidArgumentException.class, e.getCause().getClass());
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+
+  @Test
+  public void listLocationsTest() throws Exception {
+    Location responsesElement = Location.newBuilder().build();
+    ListLocationsResponse expectedResponse =
+        ListLocationsResponse.newBuilder()
+            .setNextPageToken("")
+            .addAllLocations(Arrays.asList(responsesElement))
+            .build();
+    mockLocations.addResponse(expectedResponse);
+
+    ListLocationsRequest request =
+        ListLocationsRequest.newBuilder()
+            .setName("name3373707")
+            .setFilter("filter-1274492040")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+
+    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
+
+    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
+
+    Assert.assertEquals(1, resources.size());
+    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
+
+    List<AbstractMessage> actualRequests = mockLocations.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    ListLocationsRequest actualRequest = ((ListLocationsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getName(), actualRequest.getName());
+    Assert.assertEquals(request.getFilter(), actualRequest.getFilter());
+    Assert.assertEquals(request.getPageSize(), actualRequest.getPageSize());
+    Assert.assertEquals(request.getPageToken(), actualRequest.getPageToken());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void listLocationsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockLocations.addException(exception);
+
+    try {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      client.listLocations(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void getLocationTest() throws Exception {
+    Location expectedResponse =
+        Location.newBuilder()
+            .setName("name3373707")
+            .setLocationId("locationId1541836720")
+            .setDisplayName("displayName1714148973")
+            .putAllLabels(new HashMap<String, String>())
+            .setMetadata(Any.newBuilder().build())
+            .build();
+    mockLocations.addResponse(expectedResponse);
+
+    GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+
+    Location actualResponse = client.getLocation(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockLocations.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    GetLocationRequest actualRequest = ((GetLocationRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getName(), actualRequest.getName());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void getLocationExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockLocations.addException(exception);
+
+    try {
+      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+      client.getLocation(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
new file mode 100644
index 0000000000..a078fda36d
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.ServerServiceDefinition;
+import java.util.List;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockCollisions implements MockGrpcService {
+  private final MockCollisionsImpl serviceImpl;
+
+  public MockCollisions() {
+    serviceImpl = new MockCollisionsImpl();
+  }
+
+  @Override
+  public List<AbstractMessage> getRequests() {
+    return serviceImpl.getRequests();
+  }
+
+  @Override
+  public void addResponse(AbstractMessage response) {
+    serviceImpl.addResponse(response);
+  }
+
+  @Override
+  public void addException(Exception exception) {
+    serviceImpl.addException(exception);
+  }
+
+  @Override
+  public ServerServiceDefinition getServiceDefinition() {
+    return serviceImpl.bindService();
+  }
+
+  @Override
+  public void reset() {
+    serviceImpl.reset();
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
new file mode 100644
index 0000000000..2f06a674dc
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import com.google.api.core.BetaApi;
+import com.google.longrunning.Operation;
+import com.google.protobuf.AbstractMessage;
+import com.google.showcase.v1beta1.CollisionsGrpc.CollisionsImplBase;
+import io.grpc.stub.StreamObserver;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockCollisionsImpl extends CollisionsImplBase {
+  private List<AbstractMessage> requests;
+  private Queue<Object> responses;
+
+  public MockCollisionsImpl() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  public List<AbstractMessage> getRequests() {
+    return requests;
+  }
+
+  public void addResponse(AbstractMessage response) {
+    responses.add(response);
+  }
+
+  public void setResponses(List<AbstractMessage> responses) {
+    this.responses = new LinkedList<Object>(responses);
+  }
+
+  public void addException(Exception exception) {
+    responses.add(exception);
+  }
+
+  public void reset() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  @Override
+  public void doSomething(Request request, StreamObserver<Operation> responseObserver) {
+    Object response = responses.poll();
+    if (response instanceof Operation) {
+      requests.add(request);
+      responseObserver.onNext(((Operation) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method doSomething, expected %s or %s",
+                  response == null ? "null" : response.getClass().getName(),
+                  Operation.class.getName(),
+                  Exception.class.getName())));
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
new file mode 100644
index 0000000000..94a2d21499
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.ServerServiceDefinition;
+import java.util.List;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockWicked implements MockGrpcService {
+  private final MockWickedImpl serviceImpl;
+
+  public MockWicked() {
+    serviceImpl = new MockWickedImpl();
+  }
+
+  @Override
+  public List<AbstractMessage> getRequests() {
+    return serviceImpl.getRequests();
+  }
+
+  @Override
+  public void addResponse(AbstractMessage response) {
+    serviceImpl.addResponse(response);
+  }
+
+  @Override
+  public void addException(Exception exception) {
+    serviceImpl.addException(exception);
+  }
+
+  @Override
+  public ServerServiceDefinition getServiceDefinition() {
+    return serviceImpl.bindService();
+  }
+
+  @Override
+  public void reset() {
+    serviceImpl.reset();
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
new file mode 100644
index 0000000000..0db01ba8a6
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import com.google.api.core.BetaApi;
+import com.google.protobuf.AbstractMessage;
+import com.google.showcase.v1beta1.WickedGrpc.WickedImplBase;
+import io.grpc.stub.StreamObserver;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockWickedImpl extends WickedImplBase {
+  private List<AbstractMessage> requests;
+  private Queue<Object> responses;
+
+  public MockWickedImpl() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  public List<AbstractMessage> getRequests() {
+    return requests;
+  }
+
+  public void addResponse(AbstractMessage response) {
+    responses.add(response);
+  }
+
+  public void setResponses(List<AbstractMessage> responses) {
+    this.responses = new LinkedList<Object>(responses);
+  }
+
+  public void addException(Exception exception) {
+    responses.add(exception);
+  }
+
+  public void reset() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  @Override
+  public void craftEvilPlan(EvilRequest request, StreamObserver<EvilResponse> responseObserver) {
+    Object response = responses.poll();
+    if (response instanceof EvilResponse) {
+      requests.add(request);
+      responseObserver.onNext(((EvilResponse) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CraftEvilPlan, expected %s or %s",
+                  response == null ? "null" : response.getClass().getName(),
+                  EvilResponse.class.getName(),
+                  Exception.class.getName())));
+    }
+  }
+
+  @Override
+  public StreamObserver<EvilRequest> brainstormEvilPlans(
+      final StreamObserver<EvilResponse> responseObserver) {
+    StreamObserver<EvilRequest> requestObserver =
+        new StreamObserver<EvilRequest>() {
+          @Override
+          public void onNext(EvilRequest value) {
+            requests.add(value);
+            final Object response = responses.remove();
+            if (response instanceof EvilResponse) {
+              responseObserver.onNext(((EvilResponse) response));
+            } else if (response instanceof Exception) {
+              responseObserver.onError(((Exception) response));
+            } else {
+              responseObserver.onError(
+                  new IllegalArgumentException(
+                      String.format(
+                          "Unrecognized response type %s for method BrainstormEvilPlans, expected %s or %s",
+                          response == null ? "null" : response.getClass().getName(),
+                          EvilResponse.class.getName(),
+                          Exception.class.getName())));
+            }
+          }
+
+          @Override
+          public void onError(Throwable t) {
+            responseObserver.onError(t);
+          }
+
+          @Override
+          public void onCompleted() {
+            responseObserver.onCompleted();
+          }
+        };
+    return requestObserver;
+  }
+
+  @Override
+  public StreamObserver<EvilRequest> persuadeEvilPlan(
+      final StreamObserver<EvilResponse> responseObserver) {
+    StreamObserver<EvilRequest> requestObserver =
+        new StreamObserver<EvilRequest>() {
+          @Override
+          public void onNext(EvilRequest value) {
+            requests.add(value);
+            final Object response = responses.remove();
+            if (response instanceof EvilResponse) {
+              responseObserver.onNext(((EvilResponse) response));
+            } else if (response instanceof Exception) {
+              responseObserver.onError(((Exception) response));
+            } else {
+              responseObserver.onError(
+                  new IllegalArgumentException(
+                      String.format(
+                          "Unrecognized response type %s for method PersuadeEvilPlan, expected %s or %s",
+                          response == null ? "null" : response.getClass().getName(),
+                          EvilResponse.class.getName(),
+                          Exception.class.getName())));
+            }
+          }
+
+          @Override
+          public void onError(Throwable t) {
+            responseObserver.onError(t);
+          }
+
+          @Override
+          public void onCompleted() {
+            responseObserver.onCompleted();
+          }
+        };
+    return requestObserver;
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
new file mode 100644
index 0000000000..6b68fca732
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.httpjson.GaxHttpJsonProperties;
+import com.google.api.gax.httpjson.testing.MockHttpService;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ApiException;
+import com.google.api.gax.rpc.ApiExceptionFactory;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.testing.FakeStatusCode;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.Lists;
+import com.google.protobuf.Any;
+import com.google.showcase.v1beta1.stub.HttpJsonWickedStub;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class WickedClientHttpJsonTest {
+  private static MockHttpService mockService;
+  private static WickedClient client;
+
+  @BeforeClass
+  public static void startStaticServer() throws IOException {
+    mockService =
+        new MockHttpService(
+            HttpJsonWickedStub.getMethodDescriptors(), WickedSettings.getDefaultEndpoint());
+    WickedSettings settings =
+        WickedSettings.newHttpJsonBuilder()
+            .setTransportChannelProvider(
+                WickedSettings.defaultHttpJsonTransportProviderBuilder()
+                    .setHttpTransport(mockService)
+                    .build())
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = WickedClient.create(settings);
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    client.close();
+  }
+
+  @Before
+  public void setUp() {}
+
+  @After
+  public void tearDown() throws Exception {
+    mockService.reset();
+  }
+
+  @Test
+  public void craftEvilPlanUnsupportedMethodTest() throws Exception {
+    // The craftEvilPlan() method is not supported in REST transport.
+    // This empty test is generated for technical reasons.
+  }
+
+  @Test
+  public void brainstormEvilPlansUnsupportedMethodTest() throws Exception {
+    // The brainstormEvilPlans() method is not supported in REST transport.
+    // This empty test is generated for technical reasons.
+  }
+
+  @Test
+  public void persuadeEvilPlanUnsupportedMethodTest() throws Exception {
+    // The persuadeEvilPlan() method is not supported in REST transport.
+    // This empty test is generated for technical reasons.
+  }
+
+  @Test
+  public void listLocationsTest() throws Exception {
+    Location responsesElement = Location.newBuilder().build();
+    ListLocationsResponse expectedResponse =
+        ListLocationsResponse.newBuilder()
+            .setNextPageToken("")
+            .addAllLocations(Arrays.asList(responsesElement))
+            .build();
+    mockService.addResponse(expectedResponse);
+
+    ListLocationsRequest request =
+        ListLocationsRequest.newBuilder()
+            .setName("projects/project-3664")
+            .setFilter("filter-1274492040")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+
+    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
+
+    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
+
+    Assert.assertEquals(1, resources.size());
+    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
+
+    List<String> actualRequests = mockService.getRequestPaths();
+    Assert.assertEquals(1, actualRequests.size());
+
+    String apiClientHeaderKey =
+        mockService
+            .getRequestHeaders()
+            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
+            .iterator()
+            .next();
+    Assert.assertTrue(
+        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
+            .matcher(apiClientHeaderKey)
+            .matches());
+  }
+
+  @Test
+  public void listLocationsExceptionTest() throws Exception {
+    ApiException exception =
+        ApiExceptionFactory.createException(
+            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
+    mockService.addException(exception);
+
+    try {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("projects/project-3664")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      client.listLocations(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void getLocationTest() throws Exception {
+    Location expectedResponse =
+        Location.newBuilder()
+            .setName("name3373707")
+            .setLocationId("locationId1541836720")
+            .setDisplayName("displayName1714148973")
+            .putAllLabels(new HashMap<String, String>())
+            .setMetadata(Any.newBuilder().build())
+            .build();
+    mockService.addResponse(expectedResponse);
+
+    GetLocationRequest request =
+        GetLocationRequest.newBuilder()
+            .setName("projects/project-9062/locations/location-9062")
+            .build();
+
+    Location actualResponse = client.getLocation(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<String> actualRequests = mockService.getRequestPaths();
+    Assert.assertEquals(1, actualRequests.size());
+
+    String apiClientHeaderKey =
+        mockService
+            .getRequestHeaders()
+            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
+            .iterator()
+            .next();
+    Assert.assertTrue(
+        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
+            .matcher(apiClientHeaderKey)
+            .matches());
+  }
+
+  @Test
+  public void getLocationExceptionTest() throws Exception {
+    ApiException exception =
+        ApiExceptionFactory.createException(
+            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
+    mockService.addException(exception);
+
+    try {
+      GetLocationRequest request =
+          GetLocationRequest.newBuilder()
+              .setName("projects/project-9062/locations/location-9062")
+              .build();
+      client.getLocation(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
new file mode 100644
index 0000000000..2ed4e3bad5
--- /dev/null
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
@@ -0,0 +1,326 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.showcase.v1beta1;
+
+import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.testing.LocalChannelProvider;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.api.gax.grpc.testing.MockServiceHelper;
+import com.google.api.gax.grpc.testing.MockStreamObserver;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ApiStreamObserver;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.cloud.location.GetLocationRequest;
+import com.google.cloud.location.ListLocationsRequest;
+import com.google.cloud.location.ListLocationsResponse;
+import com.google.cloud.location.Location;
+import com.google.common.collect.Lists;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.Any;
+import io.grpc.StatusRuntimeException;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class WickedClientTest {
+  private static MockLocations mockLocations;
+  private static MockServiceHelper mockServiceHelper;
+  private static MockWicked mockWicked;
+  private LocalChannelProvider channelProvider;
+  private WickedClient client;
+
+  @BeforeClass
+  public static void startStaticServer() {
+    mockWicked = new MockWicked();
+    mockLocations = new MockLocations();
+    mockServiceHelper =
+        new MockServiceHelper(
+            UUID.randomUUID().toString(),
+            Arrays.<MockGrpcService>asList(mockWicked, mockLocations));
+    mockServiceHelper.start();
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    mockServiceHelper.stop();
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    mockServiceHelper.reset();
+    channelProvider = mockServiceHelper.createChannelProvider();
+    WickedSettings settings =
+        WickedSettings.newBuilder()
+            .setTransportChannelProvider(channelProvider)
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = WickedClient.create(settings);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    client.close();
+  }
+
+  @Test
+  public void craftEvilPlanTest() throws Exception {
+    EvilResponse expectedResponse =
+        EvilResponse.newBuilder().setMaliciousPlan("maliciousPlan712757759").build();
+    mockWicked.addResponse(expectedResponse);
+
+    EvilRequest request =
+        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+
+    EvilResponse actualResponse = client.craftEvilPlan(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockWicked.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    EvilRequest actualRequest = ((EvilRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getMaliciousIdea(), actualRequest.getMaliciousIdea());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void craftEvilPlanExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockWicked.addException(exception);
+
+    try {
+      EvilRequest request =
+          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+      client.craftEvilPlan(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void brainstormEvilPlansTest() throws Exception {
+    EvilResponse expectedResponse =
+        EvilResponse.newBuilder().setMaliciousPlan("maliciousPlan712757759").build();
+    mockWicked.addResponse(expectedResponse);
+    EvilRequest request =
+        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+
+    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
+
+    BidiStreamingCallable<EvilRequest, EvilResponse> callable =
+        client.brainstormEvilPlansCallable();
+    ApiStreamObserver<EvilRequest> requestObserver = callable.bidiStreamingCall(responseObserver);
+
+    requestObserver.onNext(request);
+    requestObserver.onCompleted();
+
+    List<EvilResponse> actualResponses = responseObserver.future().get();
+    Assert.assertEquals(1, actualResponses.size());
+    Assert.assertEquals(expectedResponse, actualResponses.get(0));
+  }
+
+  @Test
+  public void brainstormEvilPlansExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockWicked.addException(exception);
+    EvilRequest request =
+        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+
+    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
+
+    BidiStreamingCallable<EvilRequest, EvilResponse> callable =
+        client.brainstormEvilPlansCallable();
+    ApiStreamObserver<EvilRequest> requestObserver = callable.bidiStreamingCall(responseObserver);
+
+    requestObserver.onNext(request);
+
+    try {
+      List<EvilResponse> actualResponses = responseObserver.future().get();
+      Assert.fail("No exception thrown");
+    } catch (ExecutionException e) {
+      Assert.assertTrue(e.getCause() instanceof InvalidArgumentException);
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+
+  @Test
+  public void persuadeEvilPlanTest() throws Exception {
+    EvilResponse expectedResponse =
+        EvilResponse.newBuilder().setMaliciousPlan("maliciousPlan712757759").build();
+    mockWicked.addResponse(expectedResponse);
+    EvilRequest request =
+        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+
+    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
+
+    ClientStreamingCallable<EvilRequest, EvilResponse> callable = client.persuadeEvilPlanCallable();
+    ApiStreamObserver<EvilRequest> requestObserver = callable.clientStreamingCall(responseObserver);
+
+    requestObserver.onNext(request);
+    requestObserver.onCompleted();
+
+    List<EvilResponse> actualResponses = responseObserver.future().get();
+    Assert.assertEquals(1, actualResponses.size());
+    Assert.assertEquals(expectedResponse, actualResponses.get(0));
+  }
+
+  @Test
+  public void persuadeEvilPlanExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockWicked.addException(exception);
+    EvilRequest request =
+        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+
+    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
+
+    ClientStreamingCallable<EvilRequest, EvilResponse> callable = client.persuadeEvilPlanCallable();
+    ApiStreamObserver<EvilRequest> requestObserver = callable.clientStreamingCall(responseObserver);
+
+    requestObserver.onNext(request);
+
+    try {
+      List<EvilResponse> actualResponses = responseObserver.future().get();
+      Assert.fail("No exception thrown");
+    } catch (ExecutionException e) {
+      Assert.assertTrue(e.getCause() instanceof InvalidArgumentException);
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+
+  @Test
+  public void listLocationsTest() throws Exception {
+    Location responsesElement = Location.newBuilder().build();
+    ListLocationsResponse expectedResponse =
+        ListLocationsResponse.newBuilder()
+            .setNextPageToken("")
+            .addAllLocations(Arrays.asList(responsesElement))
+            .build();
+    mockLocations.addResponse(expectedResponse);
+
+    ListLocationsRequest request =
+        ListLocationsRequest.newBuilder()
+            .setName("name3373707")
+            .setFilter("filter-1274492040")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+
+    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
+
+    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
+
+    Assert.assertEquals(1, resources.size());
+    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
+
+    List<AbstractMessage> actualRequests = mockLocations.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    ListLocationsRequest actualRequest = ((ListLocationsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getName(), actualRequest.getName());
+    Assert.assertEquals(request.getFilter(), actualRequest.getFilter());
+    Assert.assertEquals(request.getPageSize(), actualRequest.getPageSize());
+    Assert.assertEquals(request.getPageToken(), actualRequest.getPageToken());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void listLocationsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockLocations.addException(exception);
+
+    try {
+      ListLocationsRequest request =
+          ListLocationsRequest.newBuilder()
+              .setName("name3373707")
+              .setFilter("filter-1274492040")
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .build();
+      client.listLocations(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void getLocationTest() throws Exception {
+    Location expectedResponse =
+        Location.newBuilder()
+            .setName("name3373707")
+            .setLocationId("locationId1541836720")
+            .setDisplayName("displayName1714148973")
+            .putAllLabels(new HashMap<String, String>())
+            .setMetadata(Any.newBuilder().build())
+            .build();
+    mockLocations.addResponse(expectedResponse);
+
+    GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+
+    Location actualResponse = client.getLocation(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockLocations.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    GetLocationRequest actualRequest = ((GetLocationRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getName(), actualRequest.getName());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void getLocationExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockLocations.addException(exception);
+
+    try {
+      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
+      client.getLocation(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+}
diff --git a/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java b/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java
new file mode 100644
index 0000000000..ad352a06e0
--- /dev/null
+++ b/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java
@@ -0,0 +1,293 @@
+package com.google.showcase.v1beta1;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+
+/**
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler",
+    comments = "Source: showcase/gapic-showcase-extended/proto/collisions.proto")
+@io.grpc.stub.annotations.GrpcGenerated
+public final class CollisionsGrpc {
+
+  private CollisionsGrpc() {}
+
+  public static final String SERVICE_NAME = "google.showcase.v1beta1.Collisions";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.Request,
+      com.google.longrunning.Operation> getDoSomethingMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "doSomething",
+      requestType = com.google.showcase.v1beta1.Request.class,
+      responseType = com.google.longrunning.Operation.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.Request,
+      com.google.longrunning.Operation> getDoSomethingMethod() {
+    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.Request, com.google.longrunning.Operation> getDoSomethingMethod;
+    if ((getDoSomethingMethod = CollisionsGrpc.getDoSomethingMethod) == null) {
+      synchronized (CollisionsGrpc.class) {
+        if ((getDoSomethingMethod = CollisionsGrpc.getDoSomethingMethod) == null) {
+          CollisionsGrpc.getDoSomethingMethod = getDoSomethingMethod =
+              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.Request, com.google.longrunning.Operation>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "doSomething"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.Request.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.longrunning.Operation.getDefaultInstance()))
+              .setSchemaDescriptor(new CollisionsMethodDescriptorSupplier("doSomething"))
+              .build();
+        }
+      }
+    }
+    return getDoSomethingMethod;
+  }
+
+  /**
+   * Creates a new async stub that supports all call types for the service
+   */
+  public static CollisionsStub newStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<CollisionsStub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<CollisionsStub>() {
+        @java.lang.Override
+        public CollisionsStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new CollisionsStub(channel, callOptions);
+        }
+      };
+    return CollisionsStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static CollisionsBlockingStub newBlockingStub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<CollisionsBlockingStub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<CollisionsBlockingStub>() {
+        @java.lang.Override
+        public CollisionsBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new CollisionsBlockingStub(channel, callOptions);
+        }
+      };
+    return CollisionsBlockingStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new ListenableFuture-style stub that supports unary calls on the service
+   */
+  public static CollisionsFutureStub newFutureStub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<CollisionsFutureStub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<CollisionsFutureStub>() {
+        @java.lang.Override
+        public CollisionsFutureStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new CollisionsFutureStub(channel, callOptions);
+        }
+      };
+    return CollisionsFutureStub.newStub(factory, channel);
+  }
+
+  /**
+   */
+  public interface AsyncService {
+
+    /**
+     */
+    default void doSomething(com.google.showcase.v1beta1.Request request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(getDoSomethingMethod(), responseObserver);
+    }
+  }
+
+  /**
+   * Base class for the server implementation of the service Collisions.
+   */
+  public static abstract class CollisionsImplBase
+      implements io.grpc.BindableService, AsyncService {
+
+    @java.lang.Override public final io.grpc.ServerServiceDefinition bindService() {
+      return CollisionsGrpc.bindService(this);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do asynchronous rpc calls to service Collisions.
+   */
+  public static final class CollisionsStub
+      extends io.grpc.stub.AbstractAsyncStub<CollisionsStub> {
+    private CollisionsStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected CollisionsStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new CollisionsStub(channel, callOptions);
+    }
+
+    /**
+     */
+    public void doSomething(com.google.showcase.v1beta1.Request request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      io.grpc.stub.ClientCalls.asyncUnaryCall(
+          getChannel().newCall(getDoSomethingMethod(), getCallOptions()), request, responseObserver);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do synchronous rpc calls to service Collisions.
+   */
+  public static final class CollisionsBlockingStub
+      extends io.grpc.stub.AbstractBlockingStub<CollisionsBlockingStub> {
+    private CollisionsBlockingStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected CollisionsBlockingStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new CollisionsBlockingStub(channel, callOptions);
+    }
+
+    /**
+     */
+    public com.google.longrunning.Operation doSomething(com.google.showcase.v1beta1.Request request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getDoSomethingMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do ListenableFuture-style rpc calls to service Collisions.
+   */
+  public static final class CollisionsFutureStub
+      extends io.grpc.stub.AbstractFutureStub<CollisionsFutureStub> {
+    private CollisionsFutureStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected CollisionsFutureStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new CollisionsFutureStub(channel, callOptions);
+    }
+
+    /**
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation> doSomething(
+        com.google.showcase.v1beta1.Request request) {
+      return io.grpc.stub.ClientCalls.futureUnaryCall(
+          getChannel().newCall(getDoSomethingMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_DO_SOMETHING = 0;
+
+  private static final class MethodHandlers<Req, Resp> implements
+      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final AsyncService serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(AsyncService serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_DO_SOMETHING:
+          serviceImpl.doSomething((com.google.showcase.v1beta1.Request) request,
+              (io.grpc.stub.StreamObserver<com.google.longrunning.Operation>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  public static final io.grpc.ServerServiceDefinition bindService(AsyncService service) {
+    return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+        .addMethod(
+          getDoSomethingMethod(),
+          io.grpc.stub.ServerCalls.asyncUnaryCall(
+            new MethodHandlers<
+              com.google.showcase.v1beta1.Request,
+              com.google.longrunning.Operation>(
+                service, METHODID_DO_SOMETHING)))
+        .build();
+  }
+
+  private static abstract class CollisionsBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    CollisionsBaseDescriptorSupplier() {}
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.getDescriptor();
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("Collisions");
+    }
+  }
+
+  private static final class CollisionsFileDescriptorSupplier
+      extends CollisionsBaseDescriptorSupplier {
+    CollisionsFileDescriptorSupplier() {}
+  }
+
+  private static final class CollisionsMethodDescriptorSupplier
+      extends CollisionsBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    CollisionsMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (CollisionsGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+              .setSchemaDescriptor(new CollisionsFileDescriptorSupplier())
+              .addMethod(getDoSomethingMethod())
+              .build();
+        }
+      }
+    }
+    return result;
+  }
+}
diff --git a/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java b/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java
new file mode 100644
index 0000000000..babc778d11
--- /dev/null
+++ b/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java
@@ -0,0 +1,409 @@
+package com.google.showcase.v1beta1;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+
+/**
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler",
+    comments = "Source: showcase/gapic-showcase-extended/proto/wicked.proto")
+@io.grpc.stub.annotations.GrpcGenerated
+public final class WickedGrpc {
+
+  private WickedGrpc() {}
+
+  public static final String SERVICE_NAME = "google.showcase.v1beta1.Wicked";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
+      com.google.showcase.v1beta1.EvilResponse> getCraftEvilPlanMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "CraftEvilPlan",
+      requestType = com.google.showcase.v1beta1.EvilRequest.class,
+      responseType = com.google.showcase.v1beta1.EvilResponse.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
+      com.google.showcase.v1beta1.EvilResponse> getCraftEvilPlanMethod() {
+    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse> getCraftEvilPlanMethod;
+    if ((getCraftEvilPlanMethod = WickedGrpc.getCraftEvilPlanMethod) == null) {
+      synchronized (WickedGrpc.class) {
+        if ((getCraftEvilPlanMethod = WickedGrpc.getCraftEvilPlanMethod) == null) {
+          WickedGrpc.getCraftEvilPlanMethod = getCraftEvilPlanMethod =
+              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "CraftEvilPlan"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()))
+              .setSchemaDescriptor(new WickedMethodDescriptorSupplier("CraftEvilPlan"))
+              .build();
+        }
+      }
+    }
+    return getCraftEvilPlanMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
+      com.google.showcase.v1beta1.EvilResponse> getBrainstormEvilPlansMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "BrainstormEvilPlans",
+      requestType = com.google.showcase.v1beta1.EvilRequest.class,
+      responseType = com.google.showcase.v1beta1.EvilResponse.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
+  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
+      com.google.showcase.v1beta1.EvilResponse> getBrainstormEvilPlansMethod() {
+    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse> getBrainstormEvilPlansMethod;
+    if ((getBrainstormEvilPlansMethod = WickedGrpc.getBrainstormEvilPlansMethod) == null) {
+      synchronized (WickedGrpc.class) {
+        if ((getBrainstormEvilPlansMethod = WickedGrpc.getBrainstormEvilPlansMethod) == null) {
+          WickedGrpc.getBrainstormEvilPlansMethod = getBrainstormEvilPlansMethod =
+              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
+              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "BrainstormEvilPlans"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()))
+              .setSchemaDescriptor(new WickedMethodDescriptorSupplier("BrainstormEvilPlans"))
+              .build();
+        }
+      }
+    }
+    return getBrainstormEvilPlansMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
+      com.google.showcase.v1beta1.EvilResponse> getPersuadeEvilPlanMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "PersuadeEvilPlan",
+      requestType = com.google.showcase.v1beta1.EvilRequest.class,
+      responseType = com.google.showcase.v1beta1.EvilResponse.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.CLIENT_STREAMING)
+  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
+      com.google.showcase.v1beta1.EvilResponse> getPersuadeEvilPlanMethod() {
+    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse> getPersuadeEvilPlanMethod;
+    if ((getPersuadeEvilPlanMethod = WickedGrpc.getPersuadeEvilPlanMethod) == null) {
+      synchronized (WickedGrpc.class) {
+        if ((getPersuadeEvilPlanMethod = WickedGrpc.getPersuadeEvilPlanMethod) == null) {
+          WickedGrpc.getPersuadeEvilPlanMethod = getPersuadeEvilPlanMethod =
+              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.CLIENT_STREAMING)
+              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "PersuadeEvilPlan"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()))
+              .setSchemaDescriptor(new WickedMethodDescriptorSupplier("PersuadeEvilPlan"))
+              .build();
+        }
+      }
+    }
+    return getPersuadeEvilPlanMethod;
+  }
+
+  /**
+   * Creates a new async stub that supports all call types for the service
+   */
+  public static WickedStub newStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<WickedStub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<WickedStub>() {
+        @java.lang.Override
+        public WickedStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new WickedStub(channel, callOptions);
+        }
+      };
+    return WickedStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static WickedBlockingStub newBlockingStub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<WickedBlockingStub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<WickedBlockingStub>() {
+        @java.lang.Override
+        public WickedBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new WickedBlockingStub(channel, callOptions);
+        }
+      };
+    return WickedBlockingStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new ListenableFuture-style stub that supports unary calls on the service
+   */
+  public static WickedFutureStub newFutureStub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<WickedFutureStub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<WickedFutureStub>() {
+        @java.lang.Override
+        public WickedFutureStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new WickedFutureStub(channel, callOptions);
+        }
+      };
+    return WickedFutureStub.newStub(factory, channel);
+  }
+
+  /**
+   */
+  public interface AsyncService {
+
+    /**
+     */
+    default void craftEvilPlan(com.google.showcase.v1beta1.EvilRequest request,
+        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
+      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(getCraftEvilPlanMethod(), responseObserver);
+    }
+
+    /**
+     */
+    default io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> brainstormEvilPlans(
+        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
+      return io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall(getBrainstormEvilPlansMethod(), responseObserver);
+    }
+
+    /**
+     */
+    default io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> persuadeEvilPlan(
+        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
+      return io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall(getPersuadeEvilPlanMethod(), responseObserver);
+    }
+  }
+
+  /**
+   * Base class for the server implementation of the service Wicked.
+   */
+  public static abstract class WickedImplBase
+      implements io.grpc.BindableService, AsyncService {
+
+    @java.lang.Override public final io.grpc.ServerServiceDefinition bindService() {
+      return WickedGrpc.bindService(this);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do asynchronous rpc calls to service Wicked.
+   */
+  public static final class WickedStub
+      extends io.grpc.stub.AbstractAsyncStub<WickedStub> {
+    private WickedStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected WickedStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new WickedStub(channel, callOptions);
+    }
+
+    /**
+     */
+    public void craftEvilPlan(com.google.showcase.v1beta1.EvilRequest request,
+        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
+      io.grpc.stub.ClientCalls.asyncUnaryCall(
+          getChannel().newCall(getCraftEvilPlanMethod(), getCallOptions()), request, responseObserver);
+    }
+
+    /**
+     */
+    public io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> brainstormEvilPlans(
+        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
+      return io.grpc.stub.ClientCalls.asyncBidiStreamingCall(
+          getChannel().newCall(getBrainstormEvilPlansMethod(), getCallOptions()), responseObserver);
+    }
+
+    /**
+     */
+    public io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> persuadeEvilPlan(
+        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
+      return io.grpc.stub.ClientCalls.asyncClientStreamingCall(
+          getChannel().newCall(getPersuadeEvilPlanMethod(), getCallOptions()), responseObserver);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do synchronous rpc calls to service Wicked.
+   */
+  public static final class WickedBlockingStub
+      extends io.grpc.stub.AbstractBlockingStub<WickedBlockingStub> {
+    private WickedBlockingStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected WickedBlockingStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new WickedBlockingStub(channel, callOptions);
+    }
+
+    /**
+     */
+    public com.google.showcase.v1beta1.EvilResponse craftEvilPlan(com.google.showcase.v1beta1.EvilRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getCraftEvilPlanMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do ListenableFuture-style rpc calls to service Wicked.
+   */
+  public static final class WickedFutureStub
+      extends io.grpc.stub.AbstractFutureStub<WickedFutureStub> {
+    private WickedFutureStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected WickedFutureStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new WickedFutureStub(channel, callOptions);
+    }
+
+    /**
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.showcase.v1beta1.EvilResponse> craftEvilPlan(
+        com.google.showcase.v1beta1.EvilRequest request) {
+      return io.grpc.stub.ClientCalls.futureUnaryCall(
+          getChannel().newCall(getCraftEvilPlanMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_CRAFT_EVIL_PLAN = 0;
+  private static final int METHODID_BRAINSTORM_EVIL_PLANS = 1;
+  private static final int METHODID_PERSUADE_EVIL_PLAN = 2;
+
+  private static final class MethodHandlers<Req, Resp> implements
+      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final AsyncService serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(AsyncService serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_CRAFT_EVIL_PLAN:
+          serviceImpl.craftEvilPlan((com.google.showcase.v1beta1.EvilRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_BRAINSTORM_EVIL_PLANS:
+          return (io.grpc.stub.StreamObserver<Req>) serviceImpl.brainstormEvilPlans(
+              (io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse>) responseObserver);
+        case METHODID_PERSUADE_EVIL_PLAN:
+          return (io.grpc.stub.StreamObserver<Req>) serviceImpl.persuadeEvilPlan(
+              (io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse>) responseObserver);
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  public static final io.grpc.ServerServiceDefinition bindService(AsyncService service) {
+    return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+        .addMethod(
+          getCraftEvilPlanMethod(),
+          io.grpc.stub.ServerCalls.asyncUnaryCall(
+            new MethodHandlers<
+              com.google.showcase.v1beta1.EvilRequest,
+              com.google.showcase.v1beta1.EvilResponse>(
+                service, METHODID_CRAFT_EVIL_PLAN)))
+        .addMethod(
+          getBrainstormEvilPlansMethod(),
+          io.grpc.stub.ServerCalls.asyncBidiStreamingCall(
+            new MethodHandlers<
+              com.google.showcase.v1beta1.EvilRequest,
+              com.google.showcase.v1beta1.EvilResponse>(
+                service, METHODID_BRAINSTORM_EVIL_PLANS)))
+        .addMethod(
+          getPersuadeEvilPlanMethod(),
+          io.grpc.stub.ServerCalls.asyncClientStreamingCall(
+            new MethodHandlers<
+              com.google.showcase.v1beta1.EvilRequest,
+              com.google.showcase.v1beta1.EvilResponse>(
+                service, METHODID_PERSUADE_EVIL_PLAN)))
+        .build();
+  }
+
+  private static abstract class WickedBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    WickedBaseDescriptorSupplier() {}
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.google.showcase.v1beta1.WickedOuterClass.getDescriptor();
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("Wicked");
+    }
+  }
+
+  private static final class WickedFileDescriptorSupplier
+      extends WickedBaseDescriptorSupplier {
+    WickedFileDescriptorSupplier() {}
+  }
+
+  private static final class WickedMethodDescriptorSupplier
+      extends WickedBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    WickedMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (WickedGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+              .setSchemaDescriptor(new WickedFileDescriptorSupplier())
+              .addMethod(getCraftEvilPlanMethod())
+              .addMethod(getBrainstormEvilPlansMethod())
+              .addMethod(getPersuadeEvilPlanMethod())
+              .build();
+        }
+      }
+    }
+    return result;
+  }
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
new file mode 100644
index 0000000000..420df938ec
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
@@ -0,0 +1,509 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+/**
+ * Protobuf type {@code google.showcase.v1beta1.Annotation}
+ */
+public final class Annotation extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Annotation)
+    AnnotationOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use Annotation.newBuilder() to construct.
+  private Annotation(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private Annotation() {
+    name_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new Annotation();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.showcase.v1beta1.Annotation.class, com.google.showcase.v1beta1.Annotation.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object name_ = "";
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString
+      getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof com.google.showcase.v1beta1.Annotation)) {
+      return super.equals(obj);
+    }
+    com.google.showcase.v1beta1.Annotation other = (com.google.showcase.v1beta1.Annotation) obj;
+
+    if (!getName()
+        .equals(other.getName())) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.showcase.v1beta1.Annotation parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.showcase.v1beta1.Annotation parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.Annotation parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(com.google.showcase.v1beta1.Annotation prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code google.showcase.v1beta1.Annotation}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Annotation)
+      com.google.showcase.v1beta1.AnnotationOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.showcase.v1beta1.Annotation.class, com.google.showcase.v1beta1.Annotation.Builder.class);
+    }
+
+    // Construct using com.google.showcase.v1beta1.Annotation.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      name_ = "";
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Annotation getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.Annotation.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Annotation build() {
+      com.google.showcase.v1beta1.Annotation result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Annotation buildPartial() {
+      com.google.showcase.v1beta1.Annotation result = new com.google.showcase.v1beta1.Annotation(this);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.showcase.v1beta1.Annotation result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.name_ = name_;
+      }
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.showcase.v1beta1.Annotation) {
+        return mergeFrom((com.google.showcase.v1beta1.Annotation)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.showcase.v1beta1.Annotation other) {
+      if (other == com.google.showcase.v1beta1.Annotation.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+              name_ = input.readStringRequireUtf8();
+              bitField0_ |= 0x00000001;
+              break;
+            } // case 10
+            default: {
+              if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                done = true; // was an endgroup tag
+              }
+              break;
+            } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.lang.Object name_ = "";
+    /**
+     * <code>string name = 1;</code>
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString
+        getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(
+        java.lang.String value) {
+      if (value == null) { throw new NullPointerException(); }
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+      name_ = getDefaultInstance().getName();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) { throw new NullPointerException(); }
+      checkByteStringIsUtf8(value);
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Annotation)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Annotation)
+  private static final com.google.showcase.v1beta1.Annotation DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Annotation();
+  }
+
+  public static com.google.showcase.v1beta1.Annotation getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Annotation>
+      PARSER = new com.google.protobuf.AbstractParser<Annotation>() {
+    @java.lang.Override
+    public Annotation parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<Annotation> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Annotation> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.showcase.v1beta1.Annotation getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java
new file mode 100644
index 0000000000..6801f02095
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java
@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+public interface AnnotationOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Annotation)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString
+      getNameBytes();
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
new file mode 100644
index 0000000000..326d872182
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
@@ -0,0 +1,90 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+public final class CollisionsOuterClass {
+  private CollisionsOuterClass() {}
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistryLite registry) {
+  }
+
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions(
+        (com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_google_showcase_v1beta1_Request_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_showcase_v1beta1_Request_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_google_showcase_v1beta1_Annotation_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_google_showcase_v1beta1_Location_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_showcase_v1beta1_Location_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static  com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    java.lang.String[] descriptorData = {
+      "\n7showcase/gapic-showcase-extended/proto" +
+      "/collisions.proto\022\027google.showcase.v1bet" +
+      "a1\032\027google/api/client.proto\032#google/long" +
+      "running/operations.proto\"\205\001\n\007Request\022\014\n\004" +
+      "name\030\001 \001(\t\0227\n\nannotation\030\002 \001(\0132#.google." +
+      "showcase.v1beta1.Annotation\0223\n\010location\030" +
+      "\003 \001(\0132!.google.showcase.v1beta1.Location" +
+      "\"\032\n\nAnnotation\022\014\n\004name\030\001 \001(\t\"\030\n\010Location" +
+      "\022\014\n\004name\030\001 \001(\t2\212\001\n\nCollisions\022i\n\013doSomet" +
+      "hing\022 .google.showcase.v1beta1.Request\032\035" +
+      ".google.longrunning.Operation\"\031\312A\026\n\nAnno" +
+      "tation\022\010Location\032\021\312A\016localhost:7469B\037\n\033c" +
+      "om.google.showcase.v1beta1P\001b\006proto3"
+    };
+    descriptor = com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+          com.google.api.ClientProto.getDescriptor(),
+          com.google.longrunning.OperationsProto.getDescriptor(),
+        });
+    internal_static_google_showcase_v1beta1_Request_descriptor =
+      getDescriptor().getMessageTypes().get(0);
+    internal_static_google_showcase_v1beta1_Request_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_google_showcase_v1beta1_Request_descriptor,
+        new java.lang.String[] { "Name", "Annotation", "Location", });
+    internal_static_google_showcase_v1beta1_Annotation_descriptor =
+      getDescriptor().getMessageTypes().get(1);
+    internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_google_showcase_v1beta1_Annotation_descriptor,
+        new java.lang.String[] { "Name", });
+    internal_static_google_showcase_v1beta1_Location_descriptor =
+      getDescriptor().getMessageTypes().get(2);
+    internal_static_google_showcase_v1beta1_Location_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_google_showcase_v1beta1_Location_descriptor,
+        new java.lang.String[] { "Name", });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.ClientProto.defaultHost);
+    registry.add(com.google.longrunning.OperationsProto.operationInfo);
+    com.google.protobuf.Descriptors.FileDescriptor
+        .internalUpdateFileDescriptor(descriptor, registry);
+    com.google.api.ClientProto.getDescriptor();
+    com.google.longrunning.OperationsProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
new file mode 100644
index 0000000000..e41c78284c
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
@@ -0,0 +1,509 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/wicked.proto
+
+package com.google.showcase.v1beta1;
+
+/**
+ * Protobuf type {@code google.showcase.v1beta1.EvilRequest}
+ */
+public final class EvilRequest extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.EvilRequest)
+    EvilRequestOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use EvilRequest.newBuilder() to construct.
+  private EvilRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private EvilRequest() {
+    maliciousIdea_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new EvilRequest();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.showcase.v1beta1.EvilRequest.class, com.google.showcase.v1beta1.EvilRequest.Builder.class);
+  }
+
+  public static final int MALICIOUS_IDEA_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object maliciousIdea_ = "";
+  /**
+   * <code>string malicious_idea = 1;</code>
+   * @return The maliciousIdea.
+   */
+  @java.lang.Override
+  public java.lang.String getMaliciousIdea() {
+    java.lang.Object ref = maliciousIdea_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      maliciousIdea_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string malicious_idea = 1;</code>
+   * @return The bytes for maliciousIdea.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString
+      getMaliciousIdeaBytes() {
+    java.lang.Object ref = maliciousIdea_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (java.lang.String) ref);
+      maliciousIdea_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(maliciousIdea_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, maliciousIdea_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(maliciousIdea_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, maliciousIdea_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof com.google.showcase.v1beta1.EvilRequest)) {
+      return super.equals(obj);
+    }
+    com.google.showcase.v1beta1.EvilRequest other = (com.google.showcase.v1beta1.EvilRequest) obj;
+
+    if (!getMaliciousIdea()
+        .equals(other.getMaliciousIdea())) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + MALICIOUS_IDEA_FIELD_NUMBER;
+    hash = (53 * hash) + getMaliciousIdea().hashCode();
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.showcase.v1beta1.EvilRequest parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.showcase.v1beta1.EvilRequest parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.EvilRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(com.google.showcase.v1beta1.EvilRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code google.showcase.v1beta1.EvilRequest}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.EvilRequest)
+      com.google.showcase.v1beta1.EvilRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.showcase.v1beta1.EvilRequest.class, com.google.showcase.v1beta1.EvilRequest.Builder.class);
+    }
+
+    // Construct using com.google.showcase.v1beta1.EvilRequest.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      maliciousIdea_ = "";
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.EvilRequest getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.EvilRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.EvilRequest build() {
+      com.google.showcase.v1beta1.EvilRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.EvilRequest buildPartial() {
+      com.google.showcase.v1beta1.EvilRequest result = new com.google.showcase.v1beta1.EvilRequest(this);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.showcase.v1beta1.EvilRequest result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.maliciousIdea_ = maliciousIdea_;
+      }
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.showcase.v1beta1.EvilRequest) {
+        return mergeFrom((com.google.showcase.v1beta1.EvilRequest)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.showcase.v1beta1.EvilRequest other) {
+      if (other == com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()) return this;
+      if (!other.getMaliciousIdea().isEmpty()) {
+        maliciousIdea_ = other.maliciousIdea_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+              maliciousIdea_ = input.readStringRequireUtf8();
+              bitField0_ |= 0x00000001;
+              break;
+            } // case 10
+            default: {
+              if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                done = true; // was an endgroup tag
+              }
+              break;
+            } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.lang.Object maliciousIdea_ = "";
+    /**
+     * <code>string malicious_idea = 1;</code>
+     * @return The maliciousIdea.
+     */
+    public java.lang.String getMaliciousIdea() {
+      java.lang.Object ref = maliciousIdea_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        maliciousIdea_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string malicious_idea = 1;</code>
+     * @return The bytes for maliciousIdea.
+     */
+    public com.google.protobuf.ByteString
+        getMaliciousIdeaBytes() {
+      java.lang.Object ref = maliciousIdea_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        maliciousIdea_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string malicious_idea = 1;</code>
+     * @param value The maliciousIdea to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMaliciousIdea(
+        java.lang.String value) {
+      if (value == null) { throw new NullPointerException(); }
+      maliciousIdea_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string malicious_idea = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearMaliciousIdea() {
+      maliciousIdea_ = getDefaultInstance().getMaliciousIdea();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string malicious_idea = 1;</code>
+     * @param value The bytes for maliciousIdea to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMaliciousIdeaBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) { throw new NullPointerException(); }
+      checkByteStringIsUtf8(value);
+      maliciousIdea_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.EvilRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.EvilRequest)
+  private static final com.google.showcase.v1beta1.EvilRequest DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.EvilRequest();
+  }
+
+  public static com.google.showcase.v1beta1.EvilRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<EvilRequest>
+      PARSER = new com.google.protobuf.AbstractParser<EvilRequest>() {
+    @java.lang.Override
+    public EvilRequest parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<EvilRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<EvilRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.showcase.v1beta1.EvilRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java
new file mode 100644
index 0000000000..3b9d11f981
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java
@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/wicked.proto
+
+package com.google.showcase.v1beta1;
+
+public interface EvilRequestOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.EvilRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string malicious_idea = 1;</code>
+   * @return The maliciousIdea.
+   */
+  java.lang.String getMaliciousIdea();
+  /**
+   * <code>string malicious_idea = 1;</code>
+   * @return The bytes for maliciousIdea.
+   */
+  com.google.protobuf.ByteString
+      getMaliciousIdeaBytes();
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
new file mode 100644
index 0000000000..d9c0a7a380
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
@@ -0,0 +1,509 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/wicked.proto
+
+package com.google.showcase.v1beta1;
+
+/**
+ * Protobuf type {@code google.showcase.v1beta1.EvilResponse}
+ */
+public final class EvilResponse extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.EvilResponse)
+    EvilResponseOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use EvilResponse.newBuilder() to construct.
+  private EvilResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private EvilResponse() {
+    maliciousPlan_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new EvilResponse();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.showcase.v1beta1.EvilResponse.class, com.google.showcase.v1beta1.EvilResponse.Builder.class);
+  }
+
+  public static final int MALICIOUS_PLAN_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object maliciousPlan_ = "";
+  /**
+   * <code>string malicious_plan = 1;</code>
+   * @return The maliciousPlan.
+   */
+  @java.lang.Override
+  public java.lang.String getMaliciousPlan() {
+    java.lang.Object ref = maliciousPlan_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      maliciousPlan_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string malicious_plan = 1;</code>
+   * @return The bytes for maliciousPlan.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString
+      getMaliciousPlanBytes() {
+    java.lang.Object ref = maliciousPlan_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (java.lang.String) ref);
+      maliciousPlan_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(maliciousPlan_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, maliciousPlan_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(maliciousPlan_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, maliciousPlan_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof com.google.showcase.v1beta1.EvilResponse)) {
+      return super.equals(obj);
+    }
+    com.google.showcase.v1beta1.EvilResponse other = (com.google.showcase.v1beta1.EvilResponse) obj;
+
+    if (!getMaliciousPlan()
+        .equals(other.getMaliciousPlan())) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + MALICIOUS_PLAN_FIELD_NUMBER;
+    hash = (53 * hash) + getMaliciousPlan().hashCode();
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.showcase.v1beta1.EvilResponse parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.showcase.v1beta1.EvilResponse parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(com.google.showcase.v1beta1.EvilResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code google.showcase.v1beta1.EvilResponse}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.EvilResponse)
+      com.google.showcase.v1beta1.EvilResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.showcase.v1beta1.EvilResponse.class, com.google.showcase.v1beta1.EvilResponse.Builder.class);
+    }
+
+    // Construct using com.google.showcase.v1beta1.EvilResponse.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      maliciousPlan_ = "";
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.EvilResponse getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.EvilResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.EvilResponse build() {
+      com.google.showcase.v1beta1.EvilResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.EvilResponse buildPartial() {
+      com.google.showcase.v1beta1.EvilResponse result = new com.google.showcase.v1beta1.EvilResponse(this);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.showcase.v1beta1.EvilResponse result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.maliciousPlan_ = maliciousPlan_;
+      }
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.showcase.v1beta1.EvilResponse) {
+        return mergeFrom((com.google.showcase.v1beta1.EvilResponse)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.showcase.v1beta1.EvilResponse other) {
+      if (other == com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()) return this;
+      if (!other.getMaliciousPlan().isEmpty()) {
+        maliciousPlan_ = other.maliciousPlan_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+              maliciousPlan_ = input.readStringRequireUtf8();
+              bitField0_ |= 0x00000001;
+              break;
+            } // case 10
+            default: {
+              if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                done = true; // was an endgroup tag
+              }
+              break;
+            } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.lang.Object maliciousPlan_ = "";
+    /**
+     * <code>string malicious_plan = 1;</code>
+     * @return The maliciousPlan.
+     */
+    public java.lang.String getMaliciousPlan() {
+      java.lang.Object ref = maliciousPlan_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        maliciousPlan_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string malicious_plan = 1;</code>
+     * @return The bytes for maliciousPlan.
+     */
+    public com.google.protobuf.ByteString
+        getMaliciousPlanBytes() {
+      java.lang.Object ref = maliciousPlan_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        maliciousPlan_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string malicious_plan = 1;</code>
+     * @param value The maliciousPlan to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMaliciousPlan(
+        java.lang.String value) {
+      if (value == null) { throw new NullPointerException(); }
+      maliciousPlan_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string malicious_plan = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearMaliciousPlan() {
+      maliciousPlan_ = getDefaultInstance().getMaliciousPlan();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string malicious_plan = 1;</code>
+     * @param value The bytes for maliciousPlan to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMaliciousPlanBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) { throw new NullPointerException(); }
+      checkByteStringIsUtf8(value);
+      maliciousPlan_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.EvilResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.EvilResponse)
+  private static final com.google.showcase.v1beta1.EvilResponse DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.EvilResponse();
+  }
+
+  public static com.google.showcase.v1beta1.EvilResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<EvilResponse>
+      PARSER = new com.google.protobuf.AbstractParser<EvilResponse>() {
+    @java.lang.Override
+    public EvilResponse parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<EvilResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<EvilResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.showcase.v1beta1.EvilResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java
new file mode 100644
index 0000000000..4c78259881
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java
@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/wicked.proto
+
+package com.google.showcase.v1beta1;
+
+public interface EvilResponseOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.EvilResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string malicious_plan = 1;</code>
+   * @return The maliciousPlan.
+   */
+  java.lang.String getMaliciousPlan();
+  /**
+   * <code>string malicious_plan = 1;</code>
+   * @return The bytes for maliciousPlan.
+   */
+  com.google.protobuf.ByteString
+      getMaliciousPlanBytes();
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
new file mode 100644
index 0000000000..df879e8365
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
@@ -0,0 +1,509 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+/**
+ * Protobuf type {@code google.showcase.v1beta1.Location}
+ */
+public final class Location extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Location)
+    LocationOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use Location.newBuilder() to construct.
+  private Location(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private Location() {
+    name_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new Location();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.showcase.v1beta1.Location.class, com.google.showcase.v1beta1.Location.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object name_ = "";
+  /**
+   * <code>string name = 1;</code>
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+    if (!getName()
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+  public static com.google.showcase.v1beta1.Location parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Location parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Location parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
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+  public static com.google.showcase.v1beta1.Location parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Location parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
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+  public static com.google.showcase.v1beta1.Location parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
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+  public static com.google.showcase.v1beta1.Location parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
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+
+  public static com.google.showcase.v1beta1.Location parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
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+
+  public static com.google.showcase.v1beta1.Location parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Location parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.Location parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(com.google.showcase.v1beta1.Location prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code google.showcase.v1beta1.Location}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Location)
+      com.google.showcase.v1beta1.LocationOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
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+          .ensureFieldAccessorsInitialized(
+              com.google.showcase.v1beta1.Location.class, com.google.showcase.v1beta1.Location.Builder.class);
+    }
+
+    // Construct using com.google.showcase.v1beta1.Location.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      name_ = "";
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Location getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.Location.getDefaultInstance();
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+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Location build() {
+      com.google.showcase.v1beta1.Location result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
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+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Location buildPartial() {
+      com.google.showcase.v1beta1.Location result = new com.google.showcase.v1beta1.Location(this);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.showcase.v1beta1.Location result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.name_ = name_;
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+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.showcase.v1beta1.Location) {
+        return mergeFrom((com.google.showcase.v1beta1.Location)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.showcase.v1beta1.Location other) {
+      if (other == com.google.showcase.v1beta1.Location.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
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+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
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+      try {
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+        while (!done) {
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+              done = true;
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+            case 10: {
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+              bitField0_ |= 0x00000001;
+              break;
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+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.lang.Object name_ = "";
+    /**
+     * <code>string name = 1;</code>
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
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+        java.lang.String s = bs.toStringUtf8();
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+        return s;
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+        com.google.protobuf.ByteString b = 
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+    /**
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+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(
+        java.lang.String value) {
+      if (value == null) { throw new NullPointerException(); }
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+      name_ = getDefaultInstance().getName();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) { throw new NullPointerException(); }
+      checkByteStringIsUtf8(value);
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Location)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Location)
+  private static final com.google.showcase.v1beta1.Location DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Location();
+  }
+
+  public static com.google.showcase.v1beta1.Location getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Location>
+      PARSER = new com.google.protobuf.AbstractParser<Location>() {
+    @java.lang.Override
+    public Location parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<Location> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Location> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.showcase.v1beta1.Location getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
new file mode 100644
index 0000000000..37f73be8aa
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+public interface LocationOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Location)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString
+      getNameBytes();
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
new file mode 100644
index 0000000000..9374b40128
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
@@ -0,0 +1,871 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+/**
+ * Protobuf type {@code google.showcase.v1beta1.Request}
+ */
+public final class Request extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Request)
+    RequestOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use Request.newBuilder() to construct.
+  private Request(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private Request() {
+    name_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new Request();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Request_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Request_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.showcase.v1beta1.Request.class, com.google.showcase.v1beta1.Request.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object name_ = "";
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString
+      getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int ANNOTATION_FIELD_NUMBER = 2;
+  private com.google.showcase.v1beta1.Annotation annotation_;
+  /**
+   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+   * @return Whether the annotation field is set.
+   */
+  @java.lang.Override
+  public boolean hasAnnotation() {
+    return annotation_ != null;
+  }
+  /**
+   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+   * @return The annotation.
+   */
+  @java.lang.Override
+  public com.google.showcase.v1beta1.Annotation getAnnotation() {
+    return annotation_ == null ? com.google.showcase.v1beta1.Annotation.getDefaultInstance() : annotation_;
+  }
+  /**
+   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder() {
+    return annotation_ == null ? com.google.showcase.v1beta1.Annotation.getDefaultInstance() : annotation_;
+  }
+
+  public static final int LOCATION_FIELD_NUMBER = 3;
+  private com.google.showcase.v1beta1.Location location_;
+  /**
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return Whether the location field is set.
+   */
+  @java.lang.Override
+  public boolean hasLocation() {
+    return location_ != null;
+  }
+  /**
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return The location.
+   */
+  @java.lang.Override
+  public com.google.showcase.v1beta1.Location getLocation() {
+    return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+  }
+  /**
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
+    return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
+    }
+    if (annotation_ != null) {
+      output.writeMessage(2, getAnnotation());
+    }
+    if (location_ != null) {
+      output.writeMessage(3, getLocation());
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
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+    memoizedSize = size;
+    return size;
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+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
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+    com.google.showcase.v1beta1.Request other = (com.google.showcase.v1beta1.Request) obj;
+
+    if (!getName()
+        .equals(other.getName())) return false;
+    if (hasAnnotation() != other.hasAnnotation()) return false;
+    if (hasAnnotation()) {
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+    }
+    if (hasLocation() != other.hasLocation()) return false;
+    if (hasLocation()) {
+      if (!getLocation()
+          .equals(other.getLocation())) return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
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+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
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+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
+    if (hasAnnotation()) {
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+      hash = (53 * hash) + getAnnotation().hashCode();
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+      hash = (53 * hash) + getLocation().hashCode();
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+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
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+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.showcase.v1beta1.Request parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.showcase.v1beta1.Request parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static com.google.showcase.v1beta1.Request parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(com.google.showcase.v1beta1.Request prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code google.showcase.v1beta1.Request}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Request)
+      com.google.showcase.v1beta1.RequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Request_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Request_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.showcase.v1beta1.Request.class, com.google.showcase.v1beta1.Request.Builder.class);
+    }
+
+    // Construct using com.google.showcase.v1beta1.Request.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      name_ = "";
+      annotation_ = null;
+      if (annotationBuilder_ != null) {
+        annotationBuilder_.dispose();
+        annotationBuilder_ = null;
+      }
+      location_ = null;
+      if (locationBuilder_ != null) {
+        locationBuilder_.dispose();
+        locationBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Request_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Request getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.Request.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Request build() {
+      com.google.showcase.v1beta1.Request result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.showcase.v1beta1.Request buildPartial() {
+      com.google.showcase.v1beta1.Request result = new com.google.showcase.v1beta1.Request(this);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.showcase.v1beta1.Request result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.name_ = name_;
+      }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.annotation_ = annotationBuilder_ == null
+            ? annotation_
+            : annotationBuilder_.build();
+      }
+      if (((from_bitField0_ & 0x00000004) != 0)) {
+        result.location_ = locationBuilder_ == null
+            ? location_
+            : locationBuilder_.build();
+      }
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.showcase.v1beta1.Request) {
+        return mergeFrom((com.google.showcase.v1beta1.Request)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.showcase.v1beta1.Request other) {
+      if (other == com.google.showcase.v1beta1.Request.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      if (other.hasAnnotation()) {
+        mergeAnnotation(other.getAnnotation());
+      }
+      if (other.hasLocation()) {
+        mergeLocation(other.getLocation());
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+              name_ = input.readStringRequireUtf8();
+              bitField0_ |= 0x00000001;
+              break;
+            } // case 10
+            case 18: {
+              input.readMessage(
+                  getAnnotationFieldBuilder().getBuilder(),
+                  extensionRegistry);
+              bitField0_ |= 0x00000002;
+              break;
+            } // case 18
+            case 26: {
+              input.readMessage(
+                  getLocationFieldBuilder().getBuilder(),
+                  extensionRegistry);
+              bitField0_ |= 0x00000004;
+              break;
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+                done = true; // was an endgroup tag
+              }
+              break;
+            } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.lang.Object name_ = "";
+    /**
+     * <code>string name = 1;</code>
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString
+        getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(
+        java.lang.String value) {
+      if (value == null) { throw new NullPointerException(); }
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+      name_ = getDefaultInstance().getName();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) { throw new NullPointerException(); }
+      checkByteStringIsUtf8(value);
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    private com.google.showcase.v1beta1.Annotation annotation_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        com.google.showcase.v1beta1.Annotation, com.google.showcase.v1beta1.Annotation.Builder, com.google.showcase.v1beta1.AnnotationOrBuilder> annotationBuilder_;
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     * @return Whether the annotation field is set.
+     */
+    public boolean hasAnnotation() {
+      return ((bitField0_ & 0x00000002) != 0);
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     * @return The annotation.
+     */
+    public com.google.showcase.v1beta1.Annotation getAnnotation() {
+      if (annotationBuilder_ == null) {
+        return annotation_ == null ? com.google.showcase.v1beta1.Annotation.getDefaultInstance() : annotation_;
+      } else {
+        return annotationBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    public Builder setAnnotation(com.google.showcase.v1beta1.Annotation value) {
+      if (annotationBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        annotation_ = value;
+      } else {
+        annotationBuilder_.setMessage(value);
+      }
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    public Builder setAnnotation(
+        com.google.showcase.v1beta1.Annotation.Builder builderForValue) {
+      if (annotationBuilder_ == null) {
+        annotation_ = builderForValue.build();
+      } else {
+        annotationBuilder_.setMessage(builderForValue.build());
+      }
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    public Builder mergeAnnotation(com.google.showcase.v1beta1.Annotation value) {
+      if (annotationBuilder_ == null) {
+        if (((bitField0_ & 0x00000002) != 0) &&
+          annotation_ != null &&
+          annotation_ != com.google.showcase.v1beta1.Annotation.getDefaultInstance()) {
+          getAnnotationBuilder().mergeFrom(value);
+        } else {
+          annotation_ = value;
+        }
+      } else {
+        annotationBuilder_.mergeFrom(value);
+      }
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    public Builder clearAnnotation() {
+      bitField0_ = (bitField0_ & ~0x00000002);
+      annotation_ = null;
+      if (annotationBuilder_ != null) {
+        annotationBuilder_.dispose();
+        annotationBuilder_ = null;
+      }
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    public com.google.showcase.v1beta1.Annotation.Builder getAnnotationBuilder() {
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return getAnnotationFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    public com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder() {
+      if (annotationBuilder_ != null) {
+        return annotationBuilder_.getMessageOrBuilder();
+      } else {
+        return annotation_ == null ?
+            com.google.showcase.v1beta1.Annotation.getDefaultInstance() : annotation_;
+      }
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        com.google.showcase.v1beta1.Annotation, com.google.showcase.v1beta1.Annotation.Builder, com.google.showcase.v1beta1.AnnotationOrBuilder> 
+        getAnnotationFieldBuilder() {
+      if (annotationBuilder_ == null) {
+        annotationBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            com.google.showcase.v1beta1.Annotation, com.google.showcase.v1beta1.Annotation.Builder, com.google.showcase.v1beta1.AnnotationOrBuilder>(
+                getAnnotation(),
+                getParentForChildren(),
+                isClean());
+        annotation_ = null;
+      }
+      return annotationBuilder_;
+    }
+
+    private com.google.showcase.v1beta1.Location location_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> locationBuilder_;
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * @return Whether the location field is set.
+     */
+    public boolean hasLocation() {
+      return ((bitField0_ & 0x00000004) != 0);
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * @return The location.
+     */
+    public com.google.showcase.v1beta1.Location getLocation() {
+      if (locationBuilder_ == null) {
+        return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+      } else {
+        return locationBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    public Builder setLocation(com.google.showcase.v1beta1.Location value) {
+      if (locationBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        location_ = value;
+      } else {
+        locationBuilder_.setMessage(value);
+      }
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    public Builder setLocation(
+        com.google.showcase.v1beta1.Location.Builder builderForValue) {
+      if (locationBuilder_ == null) {
+        location_ = builderForValue.build();
+      } else {
+        locationBuilder_.setMessage(builderForValue.build());
+      }
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    public Builder mergeLocation(com.google.showcase.v1beta1.Location value) {
+      if (locationBuilder_ == null) {
+        if (((bitField0_ & 0x00000004) != 0) &&
+          location_ != null &&
+          location_ != com.google.showcase.v1beta1.Location.getDefaultInstance()) {
+          getLocationBuilder().mergeFrom(value);
+        } else {
+          location_ = value;
+        }
+      } else {
+        locationBuilder_.mergeFrom(value);
+      }
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    public Builder clearLocation() {
+      bitField0_ = (bitField0_ & ~0x00000004);
+      location_ = null;
+      if (locationBuilder_ != null) {
+        locationBuilder_.dispose();
+        locationBuilder_ = null;
+      }
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    public com.google.showcase.v1beta1.Location.Builder getLocationBuilder() {
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return getLocationFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
+      if (locationBuilder_ != null) {
+        return locationBuilder_.getMessageOrBuilder();
+      } else {
+        return location_ == null ?
+            com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+      }
+    }
+    /**
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> 
+        getLocationFieldBuilder() {
+      if (locationBuilder_ == null) {
+        locationBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder>(
+                getLocation(),
+                getParentForChildren(),
+                isClean());
+        location_ = null;
+      }
+      return locationBuilder_;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Request)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Request)
+  private static final com.google.showcase.v1beta1.Request DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Request();
+  }
+
+  public static com.google.showcase.v1beta1.Request getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Request>
+      PARSER = new com.google.protobuf.AbstractParser<Request>() {
+    @java.lang.Override
+    public Request parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<Request> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Request> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.showcase.v1beta1.Request getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
new file mode 100644
index 0000000000..a8febedd64
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
@@ -0,0 +1,51 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/collisions.proto
+
+package com.google.showcase.v1beta1;
+
+public interface RequestOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Request)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString
+      getNameBytes();
+
+  /**
+   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+   * @return Whether the annotation field is set.
+   */
+  boolean hasAnnotation();
+  /**
+   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+   * @return The annotation.
+   */
+  com.google.showcase.v1beta1.Annotation getAnnotation();
+  /**
+   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
+   */
+  com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder();
+
+  /**
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return Whether the location field is set.
+   */
+  boolean hasLocation();
+  /**
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return The location.
+   */
+  com.google.showcase.v1beta1.Location getLocation();
+  /**
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   */
+  com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder();
+}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java
new file mode 100644
index 0000000000..7498bd3edd
--- /dev/null
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java
@@ -0,0 +1,79 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: showcase/gapic-showcase-extended/proto/wicked.proto
+
+package com.google.showcase.v1beta1;
+
+public final class WickedOuterClass {
+  private WickedOuterClass() {}
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistryLite registry) {
+  }
+
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions(
+        (com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_google_showcase_v1beta1_EvilRequest_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_showcase_v1beta1_EvilRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static  com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    java.lang.String[] descriptorData = {
+      "\n3showcase/gapic-showcase-extended/proto" +
+      "/wicked.proto\022\027google.showcase.v1beta1\032\027" +
+      "google/api/client.proto\"%\n\013EvilRequest\022\026" +
+      "\n\016malicious_idea\030\001 \001(\t\"&\n\014EvilResponse\022\026" +
+      "\n\016malicious_plan\030\001 \001(\t2\304\002\n\006Wicked\022\\\n\rCra" +
+      "ftEvilPlan\022$.google.showcase.v1beta1.Evi" +
+      "lRequest\032%.google.showcase.v1beta1.EvilR" +
+      "esponse\022f\n\023BrainstormEvilPlans\022$.google." +
+      "showcase.v1beta1.EvilRequest\032%.google.sh" +
+      "owcase.v1beta1.EvilResponse(\0010\001\022a\n\020Persu" +
+      "adeEvilPlan\022$.google.showcase.v1beta1.Ev" +
+      "ilRequest\032%.google.showcase.v1beta1.Evil" +
+      "Response(\001\032\021\312A\016localhost:7469Bq\n\033com.goo" +
+      "gle.showcase.v1beta1P\001Z4github.com/googl" +
+      "eapis/gapic-showcase/server/genproto\352\002\031G" +
+      "oogle::Showcase::V1beta1b\006proto3"
+    };
+    descriptor = com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+          com.google.api.ClientProto.getDescriptor(),
+        });
+    internal_static_google_showcase_v1beta1_EvilRequest_descriptor =
+      getDescriptor().getMessageTypes().get(0);
+    internal_static_google_showcase_v1beta1_EvilRequest_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_google_showcase_v1beta1_EvilRequest_descriptor,
+        new java.lang.String[] { "MaliciousIdea", });
+    internal_static_google_showcase_v1beta1_EvilResponse_descriptor =
+      getDescriptor().getMessageTypes().get(1);
+    internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_google_showcase_v1beta1_EvilResponse_descriptor,
+        new java.lang.String[] { "MaliciousPlan", });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.ClientProto.defaultHost);
+    com.google.protobuf.Descriptors.FileDescriptor
+        .internalUpdateFileDescriptor(descriptor, registry);
+    com.google.api.ClientProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}

From 76d8fbaeb6594cfdc3e43fd91d3a54d7320d1b98 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Tue, 30 May 2023 23:04:59 -0400
Subject: [PATCH 05/18] fix: update LRO parsing to check package for short-form
 response and metadata types

---
 .../generator/gapic/protoparser/Parser.java   | 43 ++++++++-----------
 1 file changed, 19 insertions(+), 24 deletions(-)

diff --git a/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java b/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
index 35ba86dcc6..c1c819214e 100644
--- a/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
+++ b/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
@@ -824,39 +824,34 @@ static LongrunningOperation parseLro(
     boolean isResponseTypeNameShortOnly = lastDotIndex < 0;
     String responseTypeShortName =
         lastDotIndex >= 0 ? responseTypeName.substring(lastDotIndex + 1) : responseTypeName;
+    // When only shortname is provided, match on same proto package as method (See
+    // https://aip.dev/151)
+    String responseTypeFullName =
+        isResponseTypeNameShortOnly
+            ? methodDescriptor.getFile().getPackage() + "." + responseTypeShortName
+            : responseTypeName;
 
     lastDotIndex = metadataTypeName.lastIndexOf('.');
     boolean isMetadataTypeNameShortOnly = lastDotIndex < 0;
     String metadataTypeShortName =
         lastDotIndex >= 0 ? metadataTypeName.substring(lastDotIndex + 1) : metadataTypeName;
+    // When only shortname is provided, match on same proto package as method (See
+    // https://aip.dev/151)
+    String metadataTypeFullName =
+        isMetadataTypeNameShortOnly
+            ? methodDescriptor.getFile().getPackage() + "." + metadataTypeShortName
+            : metadataTypeName;
 
     // The messageTypes map keys to the Java fully-qualified name.
     for (Map.Entry<String, Message> messageEntry : messageTypes.entrySet()) {
-      String messageKey = messageEntry.getKey();
-      int messageLastDotIndex = messageEntry.getKey().lastIndexOf('.');
-      String messageShortName =
-          messageLastDotIndex >= 0 ? messageKey.substring(messageLastDotIndex + 1) : messageKey;
-      if (responseMessage == null) {
-        if (isResponseTypeNameShortOnly && responseTypeName.equals(messageShortName)) {
-          responseMessage = messageEntry.getValue();
-        } else if (!isResponseTypeNameShortOnly && responseTypeShortName.equals(messageShortName)) {
-          // Ensure that the full proto name matches.
-          Message candidateMessage = messageEntry.getValue();
-          if (candidateMessage.fullProtoName().equals(responseTypeName)) {
-            responseMessage = candidateMessage;
-          }
-        }
+      Message candidateMessage = messageEntry.getValue();
+      if (responseMessage == null
+          && candidateMessage.fullProtoName().equals(responseTypeFullName)) {
+        responseMessage = candidateMessage;
       }
-      if (metadataMessage == null) {
-        if (isMetadataTypeNameShortOnly && metadataTypeName.equals(messageShortName)) {
-          metadataMessage = messageEntry.getValue();
-        } else if (!isMetadataTypeNameShortOnly && metadataTypeShortName.equals(messageShortName)) {
-          // Ensure that the full proto name matches.
-          Message candidateMessage = messageEntry.getValue();
-          if (candidateMessage.fullProtoName().equals(metadataTypeName)) {
-            metadataMessage = candidateMessage;
-          }
-        }
+      if (metadataMessage == null
+          && candidateMessage.fullProtoName().equals(metadataTypeFullName)) {
+        metadataMessage = candidateMessage;
       }
     }
 

From 2e1c69e66fd46bdedbbe29695ab02a7a5fa8ebc0 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 31 May 2023 16:30:53 -0400
Subject: [PATCH 06/18] tests: exclude Location edge case from test proto and
 update goldens

---
 .../proto/collisions.proto                    |   6 +-
 .../dosomething/AsyncDoSomething.java         |   4 +-
 .../dosomething/AsyncDoSomethingLRO.java      |  13 +-
 .../dosomething/SyncDoSomething.java          |   8 +-
 .../showcase/v1beta1/CollisionsClient.java    |  28 +--
 .../showcase/v1beta1/CollisionsSettings.java  |  12 +-
 .../showcase/v1beta1/stub/CollisionsStub.java |   9 +-
 .../v1beta1/stub/CollisionsStubSettings.java  |  31 +--
 .../v1beta1/stub/GrpcCollisionsStub.java      |  15 +-
 .../v1beta1/stub/HttpJsonCollisionsStub.java  |   7 +-
 .../v1beta1/CollisionsClientTest.java         |  19 +-
 .../v1beta1/CollisionsOuterClass.java         |  20 +-
 .../v1beta1/{Location.java => Metadata.java}  | 112 +++++------
 ...nOrBuilder.java => MetadataOrBuilder.java} |   4 +-
 .../com/google/showcase/v1beta1/Request.java  | 176 +++++++++---------
 .../showcase/v1beta1/RequestOrBuilder.java    |  16 +-
 16 files changed, 212 insertions(+), 268 deletions(-)
 rename showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/{Location.java => Metadata.java} (80%)
 rename showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/{LocationOrBuilder.java => MetadataOrBuilder.java} (89%)

diff --git a/showcase/gapic-showcase-extended/proto/collisions.proto b/showcase/gapic-showcase-extended/proto/collisions.proto
index 009fcd77f9..6e73d526e0 100644
--- a/showcase/gapic-showcase-extended/proto/collisions.proto
+++ b/showcase/gapic-showcase-extended/proto/collisions.proto
@@ -29,7 +29,7 @@ service Collisions {
   rpc doSomething(Request) returns (google.longrunning.Operation) {
     option (google.longrunning.operation_info) = {
       response_type: "Annotation"
-      metadata_type: "Location"
+      metadata_type: "Metadata"
     };
   }
 }
@@ -37,13 +37,13 @@ service Collisions {
 message Request {
   string name = 1;
   Annotation annotation = 2;
-  Location location = 3;
+  Metadata metadata = 3;
 }
 
 message Annotation {
   string name = 1;
 }
 
-message Location {
+message Metadata {
   string name = 1;
 }
\ No newline at end of file
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
index 8cdc664bbd..8eb114eaac 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
@@ -21,7 +21,7 @@
 import com.google.longrunning.Operation;
 import com.google.showcase.v1beta1.Annotation;
 import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Location;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 
 public class AsyncDoSomething {
@@ -41,7 +41,7 @@ public static void asyncDoSomething() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(Location.newBuilder().build())
+              .setMetadata(Metadata.newBuilder().build())
               .build();
       ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
       // Do something.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
index 0db7250549..f9fcb62291 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
@@ -18,10 +18,9 @@
 
 // [START localhost7469_v1beta1_generated_Collisions_DoSomething_LRO_async]
 import com.google.api.gax.longrunning.OperationFuture;
-import com.google.protobuf.DescriptorProtos;
 import com.google.showcase.v1beta1.Annotation;
 import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Location;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 
 public class AsyncDoSomethingLRO {
@@ -41,14 +40,12 @@ public static void asyncDoSomethingLRO() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(Location.newBuilder().build())
+              .setMetadata(Metadata.newBuilder().build())
               .build();
-      OperationFuture<
-              DescriptorProtos.GeneratedCodeInfo.Annotation,
-              DescriptorProtos.SourceCodeInfo.Location>
-          future = collisionsClient.doSomethingOperationCallable().futureCall(request);
+      OperationFuture<Annotation, Metadata> future =
+          collisionsClient.doSomethingOperationCallable().futureCall(request);
       // Do something.
-      DescriptorProtos.GeneratedCodeInfo.Annotation response = future.get();
+      Annotation response = future.get();
     }
   }
 }
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
index dbc79d6476..255f977800 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
@@ -17,10 +17,9 @@
 package com.google.showcase.v1beta1.samples;
 
 // [START localhost7469_v1beta1_generated_Collisions_DoSomething_sync]
-import com.google.protobuf.DescriptorProtos;
 import com.google.showcase.v1beta1.Annotation;
 import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Location;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 
 public class SyncDoSomething {
@@ -40,10 +39,9 @@ public static void syncDoSomething() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(Location.newBuilder().build())
+              .setMetadata(Metadata.newBuilder().build())
               .build();
-      DescriptorProtos.GeneratedCodeInfo.Annotation response =
-          collisionsClient.doSomethingAsync(request).get();
+      Annotation response = collisionsClient.doSomethingAsync(request).get();
     }
   }
 }
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
index 133186ef2a..6f1d96c7a8 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
@@ -34,7 +34,6 @@
 import com.google.cloud.location.Location;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.longrunning.Operation;
-import com.google.protobuf.DescriptorProtos;
 import com.google.showcase.v1beta1.stub.CollisionsStub;
 import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
 import java.io.IOException;
@@ -217,19 +216,16 @@ public final OperationsClient getHttpJsonOperationsClient() {
    *       Request.newBuilder()
    *           .setName("name3373707")
    *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setLocation(Location.newBuilder().build())
+   *           .setMetadata(Metadata.newBuilder().build())
    *           .build();
-   *   DescriptorProtos.GeneratedCodeInfo.Annotation response =
-   *       collisionsClient.doSomethingAsync(request).get();
+   *   Annotation response = collisionsClient.doSomethingAsync(request).get();
    * }
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
-  public final OperationFuture<
-          DescriptorProtos.GeneratedCodeInfo.Annotation, DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingAsync(Request request) {
+  public final OperationFuture<Annotation, Metadata> doSomethingAsync(Request request) {
     return doSomethingOperationCallable().futureCall(request);
   }
 
@@ -248,22 +244,16 @@ public final OperationsClient getHttpJsonOperationsClient() {
    *       Request.newBuilder()
    *           .setName("name3373707")
    *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setLocation(Location.newBuilder().build())
+   *           .setMetadata(Metadata.newBuilder().build())
    *           .build();
-   *   OperationFuture<
-   *           DescriptorProtos.GeneratedCodeInfo.Annotation,
-   *           DescriptorProtos.SourceCodeInfo.Location>
-   *       future = collisionsClient.doSomethingOperationCallable().futureCall(request);
+   *   OperationFuture<Annotation, Metadata> future =
+   *       collisionsClient.doSomethingOperationCallable().futureCall(request);
    *   // Do something.
-   *   DescriptorProtos.GeneratedCodeInfo.Annotation response = future.get();
+   *   Annotation response = future.get();
    * }
    * }</pre>
    */
-  public final OperationCallable<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationCallable() {
+  public final OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable() {
     return stub.doSomethingOperationCallable();
   }
 
@@ -282,7 +272,7 @@ public final OperationsClient getHttpJsonOperationsClient() {
    *       Request.newBuilder()
    *           .setName("name3373707")
    *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setLocation(Location.newBuilder().build())
+   *           .setMetadata(Metadata.newBuilder().build())
    *           .build();
    *   ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
    *   // Do something.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
index b097ebb056..7ff83412c3 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
@@ -37,7 +37,6 @@
 import com.google.cloud.location.ListLocationsResponse;
 import com.google.cloud.location.Location;
 import com.google.longrunning.Operation;
-import com.google.protobuf.DescriptorProtos;
 import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
 import java.io.IOException;
 import java.util.List;
@@ -89,11 +88,7 @@ public UnaryCallSettings<Request, Operation> doSomethingSettings() {
   }
 
   /** Returns the object with the settings used for calls to doSomething. */
-  public OperationCallSettings<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationSettings() {
+  public OperationCallSettings<Request, Annotation, Metadata> doSomethingOperationSettings() {
     return ((CollisionsStubSettings) getStubSettings()).doSomethingOperationSettings();
   }
 
@@ -228,10 +223,7 @@ public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
     }
 
     /** Returns the builder for the settings used for calls to doSomething. */
-    public OperationCallSettings.Builder<
-            Request,
-            DescriptorProtos.GeneratedCodeInfo.Annotation,
-            DescriptorProtos.SourceCodeInfo.Location>
+    public OperationCallSettings.Builder<Request, Annotation, Metadata>
         doSomethingOperationSettings() {
       return getStubSettingsBuilder().doSomethingOperationSettings();
     }
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
index efdbba6e54..cd953ba815 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
@@ -28,7 +28,8 @@
 import com.google.cloud.location.Location;
 import com.google.longrunning.Operation;
 import com.google.longrunning.stub.OperationsStub;
-import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 import javax.annotation.Generated;
 
@@ -50,11 +51,7 @@ public com.google.api.gax.httpjson.longrunning.stub.OperationsStub getHttpJsonOp
     return null;
   }
 
-  public OperationCallable<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationCallable() {
+  public OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable() {
     throw new UnsupportedOperationException("Not implemented: doSomethingOperationCallable()");
   }
 
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
index 202c08ae6a..b38b5833b7 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
@@ -56,7 +56,8 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 import com.google.longrunning.Operation;
-import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 import java.io.IOException;
 import java.util.List;
@@ -107,11 +108,7 @@ public class CollisionsStubSettings extends StubSettings<CollisionsStubSettings>
       ImmutableList.<String>builder().build();
 
   private final UnaryCallSettings<Request, Operation> doSomethingSettings;
-  private final OperationCallSettings<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationSettings;
+  private final OperationCallSettings<Request, Annotation, Metadata> doSomethingOperationSettings;
   private final PagedCallSettings<
           ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
       listLocationsSettings;
@@ -176,11 +173,7 @@ public UnaryCallSettings<Request, Operation> doSomethingSettings() {
   }
 
   /** Returns the object with the settings used for calls to doSomething. */
-  public OperationCallSettings<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationSettings() {
+  public OperationCallSettings<Request, Annotation, Metadata> doSomethingOperationSettings() {
     return doSomethingOperationSettings;
   }
 
@@ -311,10 +304,7 @@ protected CollisionsStubSettings(Builder settingsBuilder) throws IOException {
   public static class Builder extends StubSettings.Builder<CollisionsStubSettings, Builder> {
     private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
     private final UnaryCallSettings.Builder<Request, Operation> doSomethingSettings;
-    private final OperationCallSettings.Builder<
-            Request,
-            DescriptorProtos.GeneratedCodeInfo.Annotation,
-            DescriptorProtos.SourceCodeInfo.Location>
+    private final OperationCallSettings.Builder<Request, Annotation, Metadata>
         doSomethingOperationSettings;
     private final PagedCallSettings.Builder<
             ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
@@ -421,11 +411,9 @@ private static Builder initDefaults(Builder builder) {
                   .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"))
                   .build())
           .setResponseTransformer(
-              ProtoOperationTransformers.ResponseTransformer.create(
-                  DescriptorProtos.GeneratedCodeInfo.Annotation.class))
+              ProtoOperationTransformers.ResponseTransformer.create(Annotation.class))
           .setMetadataTransformer(
-              ProtoOperationTransformers.MetadataTransformer.create(
-                  DescriptorProtos.SourceCodeInfo.Location.class))
+              ProtoOperationTransformers.MetadataTransformer.create(Metadata.class))
           .setPollingAlgorithm(
               OperationTimedPollAlgorithm.create(
                   RetrySettings.newBuilder()
@@ -464,10 +452,7 @@ public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
     /** Returns the builder for the settings used for calls to doSomething. */
     @BetaApi(
         "The surface for use by generated code is not stable yet and may change in the future.")
-    public OperationCallSettings.Builder<
-            Request,
-            DescriptorProtos.GeneratedCodeInfo.Annotation,
-            DescriptorProtos.SourceCodeInfo.Location>
+    public OperationCallSettings.Builder<Request, Annotation, Metadata>
         doSomethingOperationSettings() {
       return doSomethingOperationSettings;
     }
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
index 04db440b44..35fbbdfac7 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
@@ -33,7 +33,8 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.longrunning.Operation;
 import com.google.longrunning.stub.GrpcOperationsStub;
-import com.google.protobuf.DescriptorProtos;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
@@ -79,11 +80,7 @@ public class GrpcCollisionsStub extends CollisionsStub {
           .build();
 
   private final UnaryCallable<Request, Operation> doSomethingCallable;
-  private final OperationCallable<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationCallable;
+  private final OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable;
   private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
   private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
       listLocationsPagedCallable;
@@ -189,11 +186,7 @@ public UnaryCallable<Request, Operation> doSomethingCallable() {
   }
 
   @Override
-  public OperationCallable<
-          Request,
-          DescriptorProtos.GeneratedCodeInfo.Annotation,
-          DescriptorProtos.SourceCodeInfo.Location>
-      doSomethingOperationCallable() {
+  public OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable() {
     return doSomethingOperationCallable;
   }
 
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
index 58d397e5bb..832f142924 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
@@ -38,8 +38,9 @@
 import com.google.cloud.location.Location;
 import com.google.common.collect.ImmutableMap;
 import com.google.longrunning.Operation;
-import com.google.protobuf.DescriptorProtos;
 import com.google.protobuf.TypeRegistry;
+import com.google.showcase.v1beta1.Annotation;
+import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -60,8 +61,8 @@
 public class HttpJsonCollisionsStub extends CollisionsStub {
   private static final TypeRegistry typeRegistry =
       TypeRegistry.newBuilder()
-          .add(DescriptorProtos.GeneratedCodeInfo.Annotation.getDescriptor())
-          .add(DescriptorProtos.SourceCodeInfo.Location.getDescriptor())
+          .add(Metadata.getDescriptor())
+          .add(Annotation.getDescriptor())
           .build();
 
   private static final ApiMethodDescriptor<ListLocationsRequest, ListLocationsResponse>
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
index 8c0876664f..da9cfe2d15 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
@@ -34,10 +34,8 @@
 import com.google.longrunning.Operation;
 import com.google.protobuf.AbstractMessage;
 import com.google.protobuf.Any;
-import com.google.protobuf.DescriptorProtos;
 import io.grpc.StatusRuntimeException;
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
@@ -94,13 +92,7 @@ public void tearDown() throws Exception {
 
   @Test
   public void doSomethingTest() throws Exception {
-    DescriptorProtos.GeneratedCodeInfo.Annotation expectedResponse =
-        DescriptorProtos.GeneratedCodeInfo.Annotation.newBuilder()
-            .addAllPath(new ArrayList<Integer>())
-            .setSourceFile("sourceFile-1111864265")
-            .setBegin(93616297)
-            .setEnd(100571)
-            .build();
+    Annotation expectedResponse = Annotation.newBuilder().setName("name3373707").build();
     Operation resultOperation =
         Operation.newBuilder()
             .setName("doSomethingTest")
@@ -113,11 +105,10 @@ public void doSomethingTest() throws Exception {
         Request.newBuilder()
             .setName("name3373707")
             .setAnnotation(Annotation.newBuilder().build())
-            .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
+            .setMetadata(Metadata.newBuilder().build())
             .build();
 
-    DescriptorProtos.GeneratedCodeInfo.Annotation actualResponse =
-        client.doSomethingAsync(request).get();
+    Annotation actualResponse = client.doSomethingAsync(request).get();
     Assert.assertEquals(expectedResponse, actualResponse);
 
     List<AbstractMessage> actualRequests = mockCollisions.getRequests();
@@ -126,7 +117,7 @@ public void doSomethingTest() throws Exception {
 
     Assert.assertEquals(request.getName(), actualRequest.getName());
     Assert.assertEquals(request.getAnnotation(), actualRequest.getAnnotation());
-    Assert.assertEquals(request.getLocation(), actualRequest.getLocation());
+    Assert.assertEquals(request.getMetadata(), actualRequest.getMetadata());
     Assert.assertTrue(
         channelProvider.isHeaderSent(
             ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
@@ -143,7 +134,7 @@ public void doSomethingExceptionTest() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
+              .setMetadata(Metadata.newBuilder().build())
               .build();
       client.doSomethingAsync(request).get();
       Assert.fail("No exception raised");
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
index 326d872182..faf0c18e50 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
@@ -25,10 +25,10 @@ public static void registerAllExtensions(
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable;
   static final com.google.protobuf.Descriptors.Descriptor
-    internal_static_google_showcase_v1beta1_Location_descriptor;
+    internal_static_google_showcase_v1beta1_Metadata_descriptor;
   static final 
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-      internal_static_google_showcase_v1beta1_Location_fieldAccessorTable;
+      internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable;
 
   public static com.google.protobuf.Descriptors.FileDescriptor
       getDescriptor() {
@@ -43,13 +43,13 @@ public static void registerAllExtensions(
       "a1\032\027google/api/client.proto\032#google/long" +
       "running/operations.proto\"\205\001\n\007Request\022\014\n\004" +
       "name\030\001 \001(\t\0227\n\nannotation\030\002 \001(\0132#.google." +
-      "showcase.v1beta1.Annotation\0223\n\010location\030" +
-      "\003 \001(\0132!.google.showcase.v1beta1.Location" +
-      "\"\032\n\nAnnotation\022\014\n\004name\030\001 \001(\t\"\030\n\010Location" +
+      "showcase.v1beta1.Annotation\0223\n\010metadata\030" +
+      "\003 \001(\0132!.google.showcase.v1beta1.Metadata" +
+      "\"\032\n\nAnnotation\022\014\n\004name\030\001 \001(\t\"\030\n\010Metadata" +
       "\022\014\n\004name\030\001 \001(\t2\212\001\n\nCollisions\022i\n\013doSomet" +
       "hing\022 .google.showcase.v1beta1.Request\032\035" +
       ".google.longrunning.Operation\"\031\312A\026\n\nAnno" +
-      "tation\022\010Location\032\021\312A\016localhost:7469B\037\n\033c" +
+      "tation\022\010Metadata\032\021\312A\016localhost:7469B\037\n\033c" +
       "om.google.showcase.v1beta1P\001b\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
@@ -63,18 +63,18 @@ public static void registerAllExtensions(
     internal_static_google_showcase_v1beta1_Request_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_google_showcase_v1beta1_Request_descriptor,
-        new java.lang.String[] { "Name", "Annotation", "Location", });
+        new java.lang.String[] { "Name", "Annotation", "Metadata", });
     internal_static_google_showcase_v1beta1_Annotation_descriptor =
       getDescriptor().getMessageTypes().get(1);
     internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_google_showcase_v1beta1_Annotation_descriptor,
         new java.lang.String[] { "Name", });
-    internal_static_google_showcase_v1beta1_Location_descriptor =
+    internal_static_google_showcase_v1beta1_Metadata_descriptor =
       getDescriptor().getMessageTypes().get(2);
-    internal_static_google_showcase_v1beta1_Location_fieldAccessorTable = new
+    internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
-        internal_static_google_showcase_v1beta1_Location_descriptor,
+        internal_static_google_showcase_v1beta1_Metadata_descriptor,
         new java.lang.String[] { "Name", });
     com.google.protobuf.ExtensionRegistry registry =
         com.google.protobuf.ExtensionRegistry.newInstance();
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
similarity index 80%
rename from showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
rename to showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
index df879e8365..4639ffffdc 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
@@ -4,18 +4,18 @@
 package com.google.showcase.v1beta1;
 
 /**
- * Protobuf type {@code google.showcase.v1beta1.Location}
+ * Protobuf type {@code google.showcase.v1beta1.Metadata}
  */
-public final class Location extends
+public final class Metadata extends
     com.google.protobuf.GeneratedMessageV3 implements
-    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Location)
-    LocationOrBuilder {
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Metadata)
+    MetadataOrBuilder {
 private static final long serialVersionUID = 0L;
-  // Use Location.newBuilder() to construct.
-  private Location(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+  // Use Metadata.newBuilder() to construct.
+  private Metadata(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
     super(builder);
   }
-  private Location() {
+  private Metadata() {
     name_ = "";
   }
 
@@ -23,20 +23,20 @@ private Location() {
   @SuppressWarnings({"unused"})
   protected java.lang.Object newInstance(
       UnusedPrivateParameter unused) {
-    return new Location();
+    return new Metadata();
   }
 
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
-    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
   }
 
   @java.lang.Override
   protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internalGetFieldAccessorTable() {
-    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_fieldAccessorTable
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable
         .ensureFieldAccessorsInitialized(
-            com.google.showcase.v1beta1.Location.class, com.google.showcase.v1beta1.Location.Builder.class);
+            com.google.showcase.v1beta1.Metadata.class, com.google.showcase.v1beta1.Metadata.Builder.class);
   }
 
   public static final int NAME_FIELD_NUMBER = 1;
@@ -117,10 +117,10 @@ public boolean equals(final java.lang.Object obj) {
     if (obj == this) {
      return true;
     }
-    if (!(obj instanceof com.google.showcase.v1beta1.Location)) {
+    if (!(obj instanceof com.google.showcase.v1beta1.Metadata)) {
       return super.equals(obj);
     }
-    com.google.showcase.v1beta1.Location other = (com.google.showcase.v1beta1.Location) obj;
+    com.google.showcase.v1beta1.Metadata other = (com.google.showcase.v1beta1.Metadata) obj;
 
     if (!getName()
         .equals(other.getName())) return false;
@@ -142,44 +142,44 @@ public int hashCode() {
     return hash;
   }
 
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       java.nio.ByteBuffer data)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       java.nio.ByteBuffer data,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       com.google.protobuf.ByteString data)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       com.google.protobuf.ByteString data,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(byte[] data)
+  public static com.google.showcase.v1beta1.Metadata parseFrom(byte[] data)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       byte[] data,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(java.io.InputStream input)
+  public static com.google.showcase.v1beta1.Metadata parseFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws java.io.IOException {
@@ -187,26 +187,26 @@ public static com.google.showcase.v1beta1.Location parseFrom(
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
 
-  public static com.google.showcase.v1beta1.Location parseDelimitedFrom(java.io.InputStream input)
+  public static com.google.showcase.v1beta1.Metadata parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
 
-  public static com.google.showcase.v1beta1.Location parseDelimitedFrom(
+  public static com.google.showcase.v1beta1.Metadata parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       com.google.protobuf.CodedInputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input);
   }
-  public static com.google.showcase.v1beta1.Location parseFrom(
+  public static com.google.showcase.v1beta1.Metadata parseFrom(
       com.google.protobuf.CodedInputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws java.io.IOException {
@@ -219,7 +219,7 @@ public static com.google.showcase.v1beta1.Location parseFrom(
   public static Builder newBuilder() {
     return DEFAULT_INSTANCE.toBuilder();
   }
-  public static Builder newBuilder(com.google.showcase.v1beta1.Location prototype) {
+  public static Builder newBuilder(com.google.showcase.v1beta1.Metadata prototype) {
     return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
   }
   @java.lang.Override
@@ -235,26 +235,26 @@ protected Builder newBuilderForType(
     return builder;
   }
   /**
-   * Protobuf type {@code google.showcase.v1beta1.Location}
+   * Protobuf type {@code google.showcase.v1beta1.Metadata}
    */
   public static final class Builder extends
       com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
-      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Location)
-      com.google.showcase.v1beta1.LocationOrBuilder {
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Metadata)
+      com.google.showcase.v1beta1.MetadataOrBuilder {
     public static final com.google.protobuf.Descriptors.Descriptor
         getDescriptor() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
     }
 
     @java.lang.Override
     protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
         internalGetFieldAccessorTable() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_fieldAccessorTable
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable
           .ensureFieldAccessorsInitialized(
-              com.google.showcase.v1beta1.Location.class, com.google.showcase.v1beta1.Location.Builder.class);
+              com.google.showcase.v1beta1.Metadata.class, com.google.showcase.v1beta1.Metadata.Builder.class);
     }
 
-    // Construct using com.google.showcase.v1beta1.Location.newBuilder()
+    // Construct using com.google.showcase.v1beta1.Metadata.newBuilder()
     private Builder() {
 
     }
@@ -275,17 +275,17 @@ public Builder clear() {
     @java.lang.Override
     public com.google.protobuf.Descriptors.Descriptor
         getDescriptorForType() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
     }
 
     @java.lang.Override
-    public com.google.showcase.v1beta1.Location getDefaultInstanceForType() {
-      return com.google.showcase.v1beta1.Location.getDefaultInstance();
+    public com.google.showcase.v1beta1.Metadata getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.Metadata.getDefaultInstance();
     }
 
     @java.lang.Override
-    public com.google.showcase.v1beta1.Location build() {
-      com.google.showcase.v1beta1.Location result = buildPartial();
+    public com.google.showcase.v1beta1.Metadata build() {
+      com.google.showcase.v1beta1.Metadata result = buildPartial();
       if (!result.isInitialized()) {
         throw newUninitializedMessageException(result);
       }
@@ -293,14 +293,14 @@ public com.google.showcase.v1beta1.Location build() {
     }
 
     @java.lang.Override
-    public com.google.showcase.v1beta1.Location buildPartial() {
-      com.google.showcase.v1beta1.Location result = new com.google.showcase.v1beta1.Location(this);
+    public com.google.showcase.v1beta1.Metadata buildPartial() {
+      com.google.showcase.v1beta1.Metadata result = new com.google.showcase.v1beta1.Metadata(this);
       if (bitField0_ != 0) { buildPartial0(result); }
       onBuilt();
       return result;
     }
 
-    private void buildPartial0(com.google.showcase.v1beta1.Location result) {
+    private void buildPartial0(com.google.showcase.v1beta1.Metadata result) {
       int from_bitField0_ = bitField0_;
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.name_ = name_;
@@ -309,16 +309,16 @@ private void buildPartial0(com.google.showcase.v1beta1.Location result) {
 
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
-      if (other instanceof com.google.showcase.v1beta1.Location) {
-        return mergeFrom((com.google.showcase.v1beta1.Location)other);
+      if (other instanceof com.google.showcase.v1beta1.Metadata) {
+        return mergeFrom((com.google.showcase.v1beta1.Metadata)other);
       } else {
         super.mergeFrom(other);
         return this;
       }
     }
 
-    public Builder mergeFrom(com.google.showcase.v1beta1.Location other) {
-      if (other == com.google.showcase.v1beta1.Location.getDefaultInstance()) return this;
+    public Builder mergeFrom(com.google.showcase.v1beta1.Metadata other) {
+      if (other == com.google.showcase.v1beta1.Metadata.getDefaultInstance()) return this;
       if (!other.getName().isEmpty()) {
         name_ = other.name_;
         bitField0_ |= 0x00000001;
@@ -456,23 +456,23 @@ public final Builder mergeUnknownFields(
     }
 
 
-    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Location)
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Metadata)
   }
 
-  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Location)
-  private static final com.google.showcase.v1beta1.Location DEFAULT_INSTANCE;
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Metadata)
+  private static final com.google.showcase.v1beta1.Metadata DEFAULT_INSTANCE;
   static {
-    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Location();
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Metadata();
   }
 
-  public static com.google.showcase.v1beta1.Location getDefaultInstance() {
+  public static com.google.showcase.v1beta1.Metadata getDefaultInstance() {
     return DEFAULT_INSTANCE;
   }
 
-  private static final com.google.protobuf.Parser<Location>
-      PARSER = new com.google.protobuf.AbstractParser<Location>() {
+  private static final com.google.protobuf.Parser<Metadata>
+      PARSER = new com.google.protobuf.AbstractParser<Metadata>() {
     @java.lang.Override
-    public Location parsePartialFrom(
+    public Metadata parsePartialFrom(
         com.google.protobuf.CodedInputStream input,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws com.google.protobuf.InvalidProtocolBufferException {
@@ -491,17 +491,17 @@ public Location parsePartialFrom(
     }
   };
 
-  public static com.google.protobuf.Parser<Location> parser() {
+  public static com.google.protobuf.Parser<Metadata> parser() {
     return PARSER;
   }
 
   @java.lang.Override
-  public com.google.protobuf.Parser<Location> getParserForType() {
+  public com.google.protobuf.Parser<Metadata> getParserForType() {
     return PARSER;
   }
 
   @java.lang.Override
-  public com.google.showcase.v1beta1.Location getDefaultInstanceForType() {
+  public com.google.showcase.v1beta1.Metadata getDefaultInstanceForType() {
     return DEFAULT_INSTANCE;
   }
 
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/MetadataOrBuilder.java
similarity index 89%
rename from showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
rename to showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/MetadataOrBuilder.java
index 37f73be8aa..6465a7bc9c 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/MetadataOrBuilder.java
@@ -3,8 +3,8 @@
 
 package com.google.showcase.v1beta1;
 
-public interface LocationOrBuilder extends
-    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Location)
+public interface MetadataOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Metadata)
     com.google.protobuf.MessageOrBuilder {
 
   /**
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
index 9374b40128..96fa6c924f 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
@@ -104,30 +104,30 @@ public com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder()
     return annotation_ == null ? com.google.showcase.v1beta1.Annotation.getDefaultInstance() : annotation_;
   }
 
-  public static final int LOCATION_FIELD_NUMBER = 3;
-  private com.google.showcase.v1beta1.Location location_;
+  public static final int METADATA_FIELD_NUMBER = 3;
+  private com.google.showcase.v1beta1.Metadata metadata_;
   /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   * @return Whether the location field is set.
+   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+   * @return Whether the metadata field is set.
    */
   @java.lang.Override
-  public boolean hasLocation() {
-    return location_ != null;
+  public boolean hasMetadata() {
+    return metadata_ != null;
   }
   /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   * @return The location.
+   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+   * @return The metadata.
    */
   @java.lang.Override
-  public com.google.showcase.v1beta1.Location getLocation() {
-    return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+  public com.google.showcase.v1beta1.Metadata getMetadata() {
+    return metadata_ == null ? com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
   }
   /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
    */
   @java.lang.Override
-  public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
-    return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+  public com.google.showcase.v1beta1.MetadataOrBuilder getMetadataOrBuilder() {
+    return metadata_ == null ? com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
   }
 
   private byte memoizedIsInitialized = -1;
@@ -150,8 +150,8 @@ public void writeTo(com.google.protobuf.CodedOutputStream output)
     if (annotation_ != null) {
       output.writeMessage(2, getAnnotation());
     }
-    if (location_ != null) {
-      output.writeMessage(3, getLocation());
+    if (metadata_ != null) {
+      output.writeMessage(3, getMetadata());
     }
     getUnknownFields().writeTo(output);
   }
@@ -169,9 +169,9 @@ public int getSerializedSize() {
       size += com.google.protobuf.CodedOutputStream
         .computeMessageSize(2, getAnnotation());
     }
-    if (location_ != null) {
+    if (metadata_ != null) {
       size += com.google.protobuf.CodedOutputStream
-        .computeMessageSize(3, getLocation());
+        .computeMessageSize(3, getMetadata());
     }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
@@ -195,10 +195,10 @@ public boolean equals(final java.lang.Object obj) {
       if (!getAnnotation()
           .equals(other.getAnnotation())) return false;
     }
-    if (hasLocation() != other.hasLocation()) return false;
-    if (hasLocation()) {
-      if (!getLocation()
-          .equals(other.getLocation())) return false;
+    if (hasMetadata() != other.hasMetadata()) return false;
+    if (hasMetadata()) {
+      if (!getMetadata()
+          .equals(other.getMetadata())) return false;
     }
     if (!getUnknownFields().equals(other.getUnknownFields())) return false;
     return true;
@@ -217,9 +217,9 @@ public int hashCode() {
       hash = (37 * hash) + ANNOTATION_FIELD_NUMBER;
       hash = (53 * hash) + getAnnotation().hashCode();
     }
-    if (hasLocation()) {
-      hash = (37 * hash) + LOCATION_FIELD_NUMBER;
-      hash = (53 * hash) + getLocation().hashCode();
+    if (hasMetadata()) {
+      hash = (37 * hash) + METADATA_FIELD_NUMBER;
+      hash = (53 * hash) + getMetadata().hashCode();
     }
     hash = (29 * hash) + getUnknownFields().hashCode();
     memoizedHashCode = hash;
@@ -358,10 +358,10 @@ public Builder clear() {
         annotationBuilder_.dispose();
         annotationBuilder_ = null;
       }
-      location_ = null;
-      if (locationBuilder_ != null) {
-        locationBuilder_.dispose();
-        locationBuilder_ = null;
+      metadata_ = null;
+      if (metadataBuilder_ != null) {
+        metadataBuilder_.dispose();
+        metadataBuilder_ = null;
       }
       return this;
     }
@@ -405,9 +405,9 @@ private void buildPartial0(com.google.showcase.v1beta1.Request result) {
             : annotationBuilder_.build();
       }
       if (((from_bitField0_ & 0x00000004) != 0)) {
-        result.location_ = locationBuilder_ == null
-            ? location_
-            : locationBuilder_.build();
+        result.metadata_ = metadataBuilder_ == null
+            ? metadata_
+            : metadataBuilder_.build();
       }
     }
 
@@ -431,8 +431,8 @@ public Builder mergeFrom(com.google.showcase.v1beta1.Request other) {
       if (other.hasAnnotation()) {
         mergeAnnotation(other.getAnnotation());
       }
-      if (other.hasLocation()) {
-        mergeLocation(other.getLocation());
+      if (other.hasMetadata()) {
+        mergeMetadata(other.getMetadata());
       }
       this.mergeUnknownFields(other.getUnknownFields());
       onChanged();
@@ -474,7 +474,7 @@ public Builder mergeFrom(
             } // case 18
             case 26: {
               input.readMessage(
-                  getLocationFieldBuilder().getBuilder(),
+                  getMetadataFieldBuilder().getBuilder(),
                   extensionRegistry);
               bitField0_ |= 0x00000004;
               break;
@@ -687,123 +687,123 @@ public com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder()
       return annotationBuilder_;
     }
 
-    private com.google.showcase.v1beta1.Location location_;
+    private com.google.showcase.v1beta1.Metadata metadata_;
     private com.google.protobuf.SingleFieldBuilderV3<
-        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> locationBuilder_;
+        com.google.showcase.v1beta1.Metadata, com.google.showcase.v1beta1.Metadata.Builder, com.google.showcase.v1beta1.MetadataOrBuilder> metadataBuilder_;
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     * @return Whether the location field is set.
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * @return Whether the metadata field is set.
      */
-    public boolean hasLocation() {
+    public boolean hasMetadata() {
       return ((bitField0_ & 0x00000004) != 0);
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     * @return The location.
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * @return The metadata.
      */
-    public com.google.showcase.v1beta1.Location getLocation() {
-      if (locationBuilder_ == null) {
-        return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+    public com.google.showcase.v1beta1.Metadata getMetadata() {
+      if (metadataBuilder_ == null) {
+        return metadata_ == null ? com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
       } else {
-        return locationBuilder_.getMessage();
+        return metadataBuilder_.getMessage();
       }
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
-    public Builder setLocation(com.google.showcase.v1beta1.Location value) {
-      if (locationBuilder_ == null) {
+    public Builder setMetadata(com.google.showcase.v1beta1.Metadata value) {
+      if (metadataBuilder_ == null) {
         if (value == null) {
           throw new NullPointerException();
         }
-        location_ = value;
+        metadata_ = value;
       } else {
-        locationBuilder_.setMessage(value);
+        metadataBuilder_.setMessage(value);
       }
       bitField0_ |= 0x00000004;
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
-    public Builder setLocation(
-        com.google.showcase.v1beta1.Location.Builder builderForValue) {
-      if (locationBuilder_ == null) {
-        location_ = builderForValue.build();
+    public Builder setMetadata(
+        com.google.showcase.v1beta1.Metadata.Builder builderForValue) {
+      if (metadataBuilder_ == null) {
+        metadata_ = builderForValue.build();
       } else {
-        locationBuilder_.setMessage(builderForValue.build());
+        metadataBuilder_.setMessage(builderForValue.build());
       }
       bitField0_ |= 0x00000004;
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
-    public Builder mergeLocation(com.google.showcase.v1beta1.Location value) {
-      if (locationBuilder_ == null) {
+    public Builder mergeMetadata(com.google.showcase.v1beta1.Metadata value) {
+      if (metadataBuilder_ == null) {
         if (((bitField0_ & 0x00000004) != 0) &&
-          location_ != null &&
-          location_ != com.google.showcase.v1beta1.Location.getDefaultInstance()) {
-          getLocationBuilder().mergeFrom(value);
+          metadata_ != null &&
+          metadata_ != com.google.showcase.v1beta1.Metadata.getDefaultInstance()) {
+          getMetadataBuilder().mergeFrom(value);
         } else {
-          location_ = value;
+          metadata_ = value;
         }
       } else {
-        locationBuilder_.mergeFrom(value);
+        metadataBuilder_.mergeFrom(value);
       }
       bitField0_ |= 0x00000004;
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
-    public Builder clearLocation() {
+    public Builder clearMetadata() {
       bitField0_ = (bitField0_ & ~0x00000004);
-      location_ = null;
-      if (locationBuilder_ != null) {
-        locationBuilder_.dispose();
-        locationBuilder_ = null;
+      metadata_ = null;
+      if (metadataBuilder_ != null) {
+        metadataBuilder_.dispose();
+        metadataBuilder_ = null;
       }
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
-    public com.google.showcase.v1beta1.Location.Builder getLocationBuilder() {
+    public com.google.showcase.v1beta1.Metadata.Builder getMetadataBuilder() {
       bitField0_ |= 0x00000004;
       onChanged();
-      return getLocationFieldBuilder().getBuilder();
+      return getMetadataFieldBuilder().getBuilder();
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
-    public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
-      if (locationBuilder_ != null) {
-        return locationBuilder_.getMessageOrBuilder();
+    public com.google.showcase.v1beta1.MetadataOrBuilder getMetadataOrBuilder() {
+      if (metadataBuilder_ != null) {
+        return metadataBuilder_.getMessageOrBuilder();
       } else {
-        return location_ == null ?
-            com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
+        return metadata_ == null ?
+            com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
       }
     }
     /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
      */
     private com.google.protobuf.SingleFieldBuilderV3<
-        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> 
-        getLocationFieldBuilder() {
-      if (locationBuilder_ == null) {
-        locationBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
-            com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder>(
-                getLocation(),
+        com.google.showcase.v1beta1.Metadata, com.google.showcase.v1beta1.Metadata.Builder, com.google.showcase.v1beta1.MetadataOrBuilder> 
+        getMetadataFieldBuilder() {
+      if (metadataBuilder_ == null) {
+        metadataBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            com.google.showcase.v1beta1.Metadata, com.google.showcase.v1beta1.Metadata.Builder, com.google.showcase.v1beta1.MetadataOrBuilder>(
+                getMetadata(),
                 getParentForChildren(),
                 isClean());
-        location_ = null;
+        metadata_ = null;
       }
-      return locationBuilder_;
+      return metadataBuilder_;
     }
     @java.lang.Override
     public final Builder setUnknownFields(
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
index a8febedd64..fde53e1f8e 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
@@ -35,17 +35,17 @@ public interface RequestOrBuilder extends
   com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder();
 
   /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   * @return Whether the location field is set.
+   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+   * @return Whether the metadata field is set.
    */
-  boolean hasLocation();
+  boolean hasMetadata();
   /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   * @return The location.
+   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+   * @return The metadata.
    */
-  com.google.showcase.v1beta1.Location getLocation();
+  com.google.showcase.v1beta1.Metadata getMetadata();
   /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
    */
-  com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder();
+  com.google.showcase.v1beta1.MetadataOrBuilder getMetadataOrBuilder();
 }

From 7c759a9541cd22f5332cd5d977c49ba2ba5222e3 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 31 May 2023 17:27:52 -0400
Subject: [PATCH 07/18] test: update showcase-extended goldens after merging
 changes from main

---
 .../SyncCreateSetCredentialsProvider.java     |  2 +-
 .../SyncCreateSetCredentialsProvider1.java    |  2 +-
 .../create/SyncCreateSetEndpoint.java         |  2 +-
 .../dosomething/AsyncDoSomething.java         |  2 +-
 .../dosomething/AsyncDoSomethingLRO.java      |  2 +-
 .../dosomething/SyncDoSomething.java          |  2 +-
 .../getlocation/AsyncGetLocation.java         |  2 +-
 .../getlocation/SyncGetLocation.java          |  2 +-
 .../listlocations/AsyncListLocations.java     |  2 +-
 .../AsyncListLocationsPaged.java              |  2 +-
 .../listlocations/SyncListLocations.java      |  2 +-
 .../getlocation/SyncGetLocation.java          |  2 +-
 .../getlocation/SyncGetLocation.java          |  2 +-
 .../craftevilplan/SyncCraftEvilPlan.java      |  2 +-
 .../AsyncBrainstormEvilPlans.java             |  2 +-
 .../craftevilplan/AsyncCraftEvilPlan.java     |  2 +-
 .../craftevilplan/SyncCraftEvilPlan.java      |  2 +-
 .../SyncCreateSetCredentialsProvider.java     |  2 +-
 .../SyncCreateSetCredentialsProvider1.java    |  2 +-
 .../wicked/create/SyncCreateSetEndpoint.java  |  2 +-
 .../wicked/getlocation/AsyncGetLocation.java  |  2 +-
 .../wicked/getlocation/SyncGetLocation.java   |  2 +-
 .../listlocations/AsyncListLocations.java     |  2 +-
 .../AsyncListLocationsPaged.java              |  2 +-
 .../listlocations/SyncListLocations.java      |  2 +-
 .../AsyncPersuadeEvilPlan.java                |  2 +-
 .../craftevilplan/SyncCraftEvilPlan.java      |  2 +-
 .../showcase/v1beta1/CollisionsClient.java    |  2 +-
 .../showcase/v1beta1/CollisionsSettings.java  |  2 +-
 .../google/showcase/v1beta1/WickedClient.java |  2 +-
 .../showcase/v1beta1/WickedSettings.java      |  2 +-
 .../showcase/v1beta1/stub/CollisionsStub.java |  2 +-
 .../v1beta1/stub/CollisionsStubSettings.java  |  2 +-
 .../stub/GrpcCollisionsCallableFactory.java   |  2 +-
 .../v1beta1/stub/GrpcCollisionsStub.java      |  2 +-
 .../stub/GrpcWickedCallableFactory.java       |  2 +-
 .../showcase/v1beta1/stub/GrpcWickedStub.java |  2 +-
 .../HttpJsonCollisionsCallableFactory.java    |  2 +-
 .../v1beta1/stub/HttpJsonCollisionsStub.java  |  2 +-
 .../stub/HttpJsonWickedCallableFactory.java   |  2 +-
 .../v1beta1/stub/HttpJsonWickedStub.java      |  2 +-
 .../showcase/v1beta1/stub/WickedStub.java     |  2 +-
 .../v1beta1/stub/WickedStubSettings.java      |  2 +-
 .../v1beta1/CollisionsClientHttpJsonTest.java |  2 +-
 .../v1beta1/CollisionsClientTest.java         |  2 +-
 .../showcase/v1beta1/MockCollisions.java      |  2 +-
 .../showcase/v1beta1/MockCollisionsImpl.java  |  2 +-
 .../google/showcase/v1beta1/MockWicked.java   |  2 +-
 .../showcase/v1beta1/MockWickedImpl.java      |  2 +-
 .../v1beta1/WickedClientHttpJsonTest.java     |  2 +-
 .../showcase/v1beta1/WickedClientTest.java    |  2 +-
 .../google/showcase/v1beta1/Annotation.java   | 39 ++++++++++++++++++-
 .../google/showcase/v1beta1/EvilRequest.java  | 39 ++++++++++++++++++-
 .../google/showcase/v1beta1/EvilResponse.java | 39 ++++++++++++++++++-
 .../com/google/showcase/v1beta1/Metadata.java | 39 ++++++++++++++++++-
 .../com/google/showcase/v1beta1/Request.java  | 39 ++++++++++++++++++-
 56 files changed, 236 insertions(+), 61 deletions(-)

diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
index 507734e8e2..2bc2cd0be7 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
index a60f10c365..d09b8ca88d 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
index 45bf928ae6..15627c4ae9 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
index 8eb114eaac..30445aabbb 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
index f9fcb62291..ec11e8d692 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
index 255f977800..ed3426ea11 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
index 2ec2689e0e..903fcc6b26 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
index fb594b8e79..468f9a120f 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
index 83716796aa..e3231849c0 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
index 817d99ba25..1eca857f08 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
index a37b330b89..539b2c6f3b 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
index f9dfd67664..355ed7f1c5 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
index dce0590ab3..781c3f4653 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
index de6207f682..d37ea2865c 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
index 8bcb58afbb..a7a9a72437 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
index 8be0e67e7c..b7133bcc21 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
index 4b7aeb0f9c..67d75d0f2a 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
index c4eb08016b..9af0aaa741 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
index 904ca354a6..38fb1b127b 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
index bff6d56f2b..87b154260c 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
index e2228a9939..0bd173c76a 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
index 9a30312e45..e5e8f160e5 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
index 0ea2d5884a..d37e1b1fda 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
index c68cc6191a..f1b1ef00c1 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
index f17136c827..61a487a7af 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
index 88d9d4f18e..1aa00ccb50 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
index ee9bc599ad..af8709d91a 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
index 6f1d96c7a8..7ae3b9aa59 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
index 7ff83412c3..84a0fcb15a 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
index 9a4fc0ec99..014d399e74 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
index d818e2a2bf..c3a824a6b2 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
index cd953ba815..57289da7dc 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
index b38b5833b7..593b151956 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
index 6c39ee28b5..ef0ea02f4d 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
index 35fbbdfac7..59fde0f3a0 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
index a98141bc97..388b417f03 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
index 94dd0e4d01..c3e680dee2 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
index 749d6cd828..0da4f298cc 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
index 832f142924..f2367700a1 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
index 16dde24678..37726531b0 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
index 78e03df937..d45cbba41e 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
index cd9f5d2fee..0693ab1315 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
index 4f0d92cd66..dfb54a1ad3 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
index 8b3d33fd56..0aa72be007 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
index da9cfe2d15..1da72bb40d 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
index a078fda36d..580b7c4d51 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
index 2f06a674dc..ec284c97a7 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
index 94a2d21499..219dc25a91 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
index 0db01ba8a6..0fdad0b607 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
index 6b68fca732..9d3ca75149 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
index 2ed4e3bad5..67bf9d3567 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
index 420df938ec..e36e50a459 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
@@ -26,6 +26,11 @@ protected java.lang.Object newInstance(
     return new Annotation();
   }
 
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
     return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
@@ -186,13 +191,11 @@ public static com.google.showcase.v1beta1.Annotation parseFrom(
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
-
   public static com.google.showcase.v1beta1.Annotation parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
-
   public static com.google.showcase.v1beta1.Annotation parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -307,6 +310,38 @@ private void buildPartial0(com.google.showcase.v1beta1.Annotation result) {
       }
     }
 
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
       if (other instanceof com.google.showcase.v1beta1.Annotation) {
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
index e41c78284c..ed713fa0b7 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
@@ -26,6 +26,11 @@ protected java.lang.Object newInstance(
     return new EvilRequest();
   }
 
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
     return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilRequest_descriptor;
@@ -186,13 +191,11 @@ public static com.google.showcase.v1beta1.EvilRequest parseFrom(
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
-
   public static com.google.showcase.v1beta1.EvilRequest parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
-
   public static com.google.showcase.v1beta1.EvilRequest parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -307,6 +310,38 @@ private void buildPartial0(com.google.showcase.v1beta1.EvilRequest result) {
       }
     }
 
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
       if (other instanceof com.google.showcase.v1beta1.EvilRequest) {
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
index d9c0a7a380..96c096134f 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
@@ -26,6 +26,11 @@ protected java.lang.Object newInstance(
     return new EvilResponse();
   }
 
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
     return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
@@ -186,13 +191,11 @@ public static com.google.showcase.v1beta1.EvilResponse parseFrom(
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
-
   public static com.google.showcase.v1beta1.EvilResponse parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
-
   public static com.google.showcase.v1beta1.EvilResponse parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -307,6 +310,38 @@ private void buildPartial0(com.google.showcase.v1beta1.EvilResponse result) {
       }
     }
 
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
       if (other instanceof com.google.showcase.v1beta1.EvilResponse) {
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
index 4639ffffdc..e86d39b3b1 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
@@ -26,6 +26,11 @@ protected java.lang.Object newInstance(
     return new Metadata();
   }
 
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
     return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
@@ -186,13 +191,11 @@ public static com.google.showcase.v1beta1.Metadata parseFrom(
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
-
   public static com.google.showcase.v1beta1.Metadata parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
-
   public static com.google.showcase.v1beta1.Metadata parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -307,6 +310,38 @@ private void buildPartial0(com.google.showcase.v1beta1.Metadata result) {
       }
     }
 
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
       if (other instanceof com.google.showcase.v1beta1.Metadata) {
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
index 96fa6c924f..c39bb9d868 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
@@ -26,6 +26,11 @@ protected java.lang.Object newInstance(
     return new Request();
   }
 
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
     return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Request_descriptor;
@@ -270,13 +275,11 @@ public static com.google.showcase.v1beta1.Request parseFrom(
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
-
   public static com.google.showcase.v1beta1.Request parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
-
   public static com.google.showcase.v1beta1.Request parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -411,6 +414,38 @@ private void buildPartial0(com.google.showcase.v1beta1.Request result) {
       }
     }
 
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
       if (other instanceof com.google.showcase.v1beta1.Request) {

From 67fececd180a7753abb71104f25ab5efd9e10984 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 31 May 2023 22:54:08 -0400
Subject: [PATCH 08/18] fix: recursively write generics on methodInvocationExpr
 to account for fully qualified types

---
 .../google/api/generator/engine/writer/JavaWriterVisitor.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gapic-generator-java/src/main/java/com/google/api/generator/engine/writer/JavaWriterVisitor.java b/gapic-generator-java/src/main/java/com/google/api/generator/engine/writer/JavaWriterVisitor.java
index e092f1c69c..e956d86949 100644
--- a/gapic-generator-java/src/main/java/com/google/api/generator/engine/writer/JavaWriterVisitor.java
+++ b/gapic-generator-java/src/main/java/com/google/api/generator/engine/writer/JavaWriterVisitor.java
@@ -362,7 +362,8 @@ public void visit(MethodInvocationExpr methodInvocationExpr) {
       leftAngle();
       int numGenerics = methodInvocationExpr.generics().size();
       for (int i = 0; i < numGenerics; i++) {
-        buffer.append(methodInvocationExpr.generics().get(i).name());
+        Reference r = methodInvocationExpr.generics().get(i);
+        r.accept(this);
         if (i < numGenerics - 1) {
           buffer.append(COMMA);
           space();

From 30d8a0d78a01cf15fb4b2b19abe48bcdf1b00e24 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 31 May 2023 22:59:11 -0400
Subject: [PATCH 09/18] test: add Location edge case back to test proto and
 update goldens

---
 .../proto/collisions.proto                    |   6 +-
 .../dosomething/AsyncDoSomething.java         |   4 +-
 .../dosomething/AsyncDoSomethingLRO.java      |   6 +-
 .../dosomething/SyncDoSomething.java          |   4 +-
 .../showcase/v1beta1/CollisionsClient.java    |  14 +-
 .../showcase/v1beta1/CollisionsSettings.java  |   5 +-
 .../showcase/v1beta1/stub/CollisionsStub.java |   8 +-
 .../v1beta1/stub/CollisionsStubSettings.java  |  44 +++--
 .../v1beta1/stub/GrpcCollisionsStub.java      |   7 +-
 .../v1beta1/stub/HttpJsonCollisionsStub.java  |  31 +--
 .../v1beta1/CollisionsClientTest.java         |   6 +-
 .../v1beta1/CollisionsOuterClass.java         |  20 +-
 .../v1beta1/{Metadata.java => Location.java}  | 112 +++++------
 ...aOrBuilder.java => LocationOrBuilder.java} |   4 +-
 .../com/google/showcase/v1beta1/Request.java  | 176 +++++++++---------
 .../showcase/v1beta1/RequestOrBuilder.java    |  16 +-
 16 files changed, 240 insertions(+), 223 deletions(-)
 rename showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/{Metadata.java => Location.java} (81%)
 rename showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/{MetadataOrBuilder.java => LocationOrBuilder.java} (89%)

diff --git a/showcase/gapic-showcase-extended/proto/collisions.proto b/showcase/gapic-showcase-extended/proto/collisions.proto
index 6e73d526e0..009fcd77f9 100644
--- a/showcase/gapic-showcase-extended/proto/collisions.proto
+++ b/showcase/gapic-showcase-extended/proto/collisions.proto
@@ -29,7 +29,7 @@ service Collisions {
   rpc doSomething(Request) returns (google.longrunning.Operation) {
     option (google.longrunning.operation_info) = {
       response_type: "Annotation"
-      metadata_type: "Metadata"
+      metadata_type: "Location"
     };
   }
 }
@@ -37,13 +37,13 @@ service Collisions {
 message Request {
   string name = 1;
   Annotation annotation = 2;
-  Metadata metadata = 3;
+  Location location = 3;
 }
 
 message Annotation {
   string name = 1;
 }
 
-message Metadata {
+message Location {
   string name = 1;
 }
\ No newline at end of file
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
index 30445aabbb..ccfb6d757b 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
@@ -21,7 +21,7 @@
 import com.google.longrunning.Operation;
 import com.google.showcase.v1beta1.Annotation;
 import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Metadata;
+import com.google.showcase.v1beta1.Location;
 import com.google.showcase.v1beta1.Request;
 
 public class AsyncDoSomething {
@@ -41,7 +41,7 @@ public static void asyncDoSomething() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setMetadata(Metadata.newBuilder().build())
+              .setLocation(Location.newBuilder().build())
               .build();
       ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
       // Do something.
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
index ec11e8d692..6f87f4612b 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
@@ -20,7 +20,7 @@
 import com.google.api.gax.longrunning.OperationFuture;
 import com.google.showcase.v1beta1.Annotation;
 import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Metadata;
+import com.google.showcase.v1beta1.Location;
 import com.google.showcase.v1beta1.Request;
 
 public class AsyncDoSomethingLRO {
@@ -40,9 +40,9 @@ public static void asyncDoSomethingLRO() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setMetadata(Metadata.newBuilder().build())
+              .setLocation(Location.newBuilder().build())
               .build();
-      OperationFuture<Annotation, Metadata> future =
+      OperationFuture<Annotation, Location> future =
           collisionsClient.doSomethingOperationCallable().futureCall(request);
       // Do something.
       Annotation response = future.get();
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
index ed3426ea11..8512379c1b 100644
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
+++ b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
@@ -19,7 +19,7 @@
 // [START localhost7469_v1beta1_generated_Collisions_DoSomething_sync]
 import com.google.showcase.v1beta1.Annotation;
 import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Metadata;
+import com.google.showcase.v1beta1.Location;
 import com.google.showcase.v1beta1.Request;
 
 public class SyncDoSomething {
@@ -39,7 +39,7 @@ public static void syncDoSomething() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setMetadata(Metadata.newBuilder().build())
+              .setLocation(Location.newBuilder().build())
               .build();
       Annotation response = collisionsClient.doSomethingAsync(request).get();
     }
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
index 7ae3b9aa59..6a82edbe55 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
@@ -216,7 +216,7 @@ public final OperationsClient getHttpJsonOperationsClient() {
    *       Request.newBuilder()
    *           .setName("name3373707")
    *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setMetadata(Metadata.newBuilder().build())
+   *           .setLocation(Location.newBuilder().build())
    *           .build();
    *   Annotation response = collisionsClient.doSomethingAsync(request).get();
    * }
@@ -225,7 +225,8 @@ public final OperationsClient getHttpJsonOperationsClient() {
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
-  public final OperationFuture<Annotation, Metadata> doSomethingAsync(Request request) {
+  public final OperationFuture<Annotation, com.google.showcase.v1beta1.Location> doSomethingAsync(
+      Request request) {
     return doSomethingOperationCallable().futureCall(request);
   }
 
@@ -244,16 +245,17 @@ public final OperationFuture<Annotation, Metadata> doSomethingAsync(Request requ
    *       Request.newBuilder()
    *           .setName("name3373707")
    *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setMetadata(Metadata.newBuilder().build())
+   *           .setLocation(Location.newBuilder().build())
    *           .build();
-   *   OperationFuture<Annotation, Metadata> future =
+   *   OperationFuture<Annotation, Location> future =
    *       collisionsClient.doSomethingOperationCallable().futureCall(request);
    *   // Do something.
    *   Annotation response = future.get();
    * }
    * }</pre>
    */
-  public final OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable() {
+  public final OperationCallable<Request, Annotation, com.google.showcase.v1beta1.Location>
+      doSomethingOperationCallable() {
     return stub.doSomethingOperationCallable();
   }
 
@@ -272,7 +274,7 @@ public final OperationCallable<Request, Annotation, Metadata> doSomethingOperati
    *       Request.newBuilder()
    *           .setName("name3373707")
    *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setMetadata(Metadata.newBuilder().build())
+   *           .setLocation(Location.newBuilder().build())
    *           .build();
    *   ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
    *   // Do something.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
index 84a0fcb15a..87f40b9349 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
@@ -88,7 +88,8 @@ public UnaryCallSettings<Request, Operation> doSomethingSettings() {
   }
 
   /** Returns the object with the settings used for calls to doSomething. */
-  public OperationCallSettings<Request, Annotation, Metadata> doSomethingOperationSettings() {
+  public OperationCallSettings<Request, Annotation, com.google.showcase.v1beta1.Location>
+      doSomethingOperationSettings() {
     return ((CollisionsStubSettings) getStubSettings()).doSomethingOperationSettings();
   }
 
@@ -223,7 +224,7 @@ public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
     }
 
     /** Returns the builder for the settings used for calls to doSomething. */
-    public OperationCallSettings.Builder<Request, Annotation, Metadata>
+    public OperationCallSettings.Builder<Request, Annotation, com.google.showcase.v1beta1.Location>
         doSomethingOperationSettings() {
       return getStubSettingsBuilder().doSomethingOperationSettings();
     }
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
index 57289da7dc..0812b07fe1 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
@@ -25,11 +25,10 @@
 import com.google.cloud.location.GetLocationRequest;
 import com.google.cloud.location.ListLocationsRequest;
 import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
 import com.google.longrunning.Operation;
 import com.google.longrunning.stub.OperationsStub;
 import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Metadata;
+import com.google.showcase.v1beta1.Location;
 import com.google.showcase.v1beta1.Request;
 import javax.annotation.Generated;
 
@@ -51,7 +50,7 @@ public com.google.api.gax.httpjson.longrunning.stub.OperationsStub getHttpJsonOp
     return null;
   }
 
-  public OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable() {
+  public OperationCallable<Request, Annotation, Location> doSomethingOperationCallable() {
     throw new UnsupportedOperationException("Not implemented: doSomethingOperationCallable()");
   }
 
@@ -68,7 +67,8 @@ public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsC
     throw new UnsupportedOperationException("Not implemented: listLocationsCallable()");
   }
 
-  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+  public UnaryCallable<GetLocationRequest, com.google.cloud.location.Location>
+      getLocationCallable() {
     throw new UnsupportedOperationException("Not implemented: getLocationCallable()");
   }
 
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
index 593b151956..9da36484d5 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
@@ -50,14 +50,13 @@
 import com.google.cloud.location.GetLocationRequest;
 import com.google.cloud.location.ListLocationsRequest;
 import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 import com.google.longrunning.Operation;
 import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Metadata;
+import com.google.showcase.v1beta1.Location;
 import com.google.showcase.v1beta1.Request;
 import java.io.IOException;
 import java.util.List;
@@ -108,15 +107,18 @@ public class CollisionsStubSettings extends StubSettings<CollisionsStubSettings>
       ImmutableList.<String>builder().build();
 
   private final UnaryCallSettings<Request, Operation> doSomethingSettings;
-  private final OperationCallSettings<Request, Annotation, Metadata> doSomethingOperationSettings;
+  private final OperationCallSettings<Request, Annotation, Location> doSomethingOperationSettings;
   private final PagedCallSettings<
           ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
       listLocationsSettings;
-  private final UnaryCallSettings<GetLocationRequest, Location> getLocationSettings;
+  private final UnaryCallSettings<GetLocationRequest, com.google.cloud.location.Location>
+      getLocationSettings;
 
-  private static final PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>
+  private static final PagedListDescriptor<
+          ListLocationsRequest, ListLocationsResponse, com.google.cloud.location.Location>
       LIST_LOCATIONS_PAGE_STR_DESC =
-          new PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>() {
+          new PagedListDescriptor<
+              ListLocationsRequest, ListLocationsResponse, com.google.cloud.location.Location>() {
             @Override
             public String emptyToken() {
               return "";
@@ -143,9 +145,10 @@ public String extractNextToken(ListLocationsResponse payload) {
             }
 
             @Override
-            public Iterable<Location> extractResources(ListLocationsResponse payload) {
+            public Iterable<com.google.cloud.location.Location> extractResources(
+                ListLocationsResponse payload) {
               return payload.getLocationsList() == null
-                  ? ImmutableList.<Location>of()
+                  ? ImmutableList.<com.google.cloud.location.Location>of()
                   : payload.getLocationsList();
             }
           };
@@ -161,8 +164,12 @@ public ApiFuture<ListLocationsPagedResponse> getFuturePagedResponse(
                 ListLocationsRequest request,
                 ApiCallContext context,
                 ApiFuture<ListLocationsResponse> futureResponse) {
-              PageContext<ListLocationsRequest, ListLocationsResponse, Location> pageContext =
-                  PageContext.create(callable, LIST_LOCATIONS_PAGE_STR_DESC, request, context);
+              PageContext<
+                      ListLocationsRequest,
+                      ListLocationsResponse,
+                      com.google.cloud.location.Location>
+                  pageContext =
+                      PageContext.create(callable, LIST_LOCATIONS_PAGE_STR_DESC, request, context);
               return ListLocationsPagedResponse.createAsync(pageContext, futureResponse);
             }
           };
@@ -173,7 +180,7 @@ public UnaryCallSettings<Request, Operation> doSomethingSettings() {
   }
 
   /** Returns the object with the settings used for calls to doSomething. */
-  public OperationCallSettings<Request, Annotation, Metadata> doSomethingOperationSettings() {
+  public OperationCallSettings<Request, Annotation, Location> doSomethingOperationSettings() {
     return doSomethingOperationSettings;
   }
 
@@ -184,7 +191,8 @@ public OperationCallSettings<Request, Annotation, Metadata> doSomethingOperation
   }
 
   /** Returns the object with the settings used for calls to getLocation. */
-  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
+  public UnaryCallSettings<GetLocationRequest, com.google.cloud.location.Location>
+      getLocationSettings() {
     return getLocationSettings;
   }
 
@@ -304,12 +312,13 @@ protected CollisionsStubSettings(Builder settingsBuilder) throws IOException {
   public static class Builder extends StubSettings.Builder<CollisionsStubSettings, Builder> {
     private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
     private final UnaryCallSettings.Builder<Request, Operation> doSomethingSettings;
-    private final OperationCallSettings.Builder<Request, Annotation, Metadata>
+    private final OperationCallSettings.Builder<Request, Annotation, Location>
         doSomethingOperationSettings;
     private final PagedCallSettings.Builder<
             ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
         listLocationsSettings;
-    private final UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings;
+    private final UnaryCallSettings.Builder<GetLocationRequest, com.google.cloud.location.Location>
+        getLocationSettings;
     private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
         RETRYABLE_CODE_DEFINITIONS;
 
@@ -413,7 +422,7 @@ private static Builder initDefaults(Builder builder) {
           .setResponseTransformer(
               ProtoOperationTransformers.ResponseTransformer.create(Annotation.class))
           .setMetadataTransformer(
-              ProtoOperationTransformers.MetadataTransformer.create(Metadata.class))
+              ProtoOperationTransformers.MetadataTransformer.create(Location.class))
           .setPollingAlgorithm(
               OperationTimedPollAlgorithm.create(
                   RetrySettings.newBuilder()
@@ -452,7 +461,7 @@ public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
     /** Returns the builder for the settings used for calls to doSomething. */
     @BetaApi(
         "The surface for use by generated code is not stable yet and may change in the future.")
-    public OperationCallSettings.Builder<Request, Annotation, Metadata>
+    public OperationCallSettings.Builder<Request, Annotation, Location>
         doSomethingOperationSettings() {
       return doSomethingOperationSettings;
     }
@@ -465,7 +474,8 @@ public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
     }
 
     /** Returns the builder for the settings used for calls to getLocation. */
-    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
+    public UnaryCallSettings.Builder<GetLocationRequest, com.google.cloud.location.Location>
+        getLocationSettings() {
       return getLocationSettings;
     }
 
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
index 59fde0f3a0..c528dfc90e 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
@@ -34,7 +34,6 @@
 import com.google.longrunning.Operation;
 import com.google.longrunning.stub.GrpcOperationsStub;
 import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Metadata;
 import com.google.showcase.v1beta1.Request;
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
@@ -80,7 +79,8 @@ public class GrpcCollisionsStub extends CollisionsStub {
           .build();
 
   private final UnaryCallable<Request, Operation> doSomethingCallable;
-  private final OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable;
+  private final OperationCallable<Request, Annotation, com.google.showcase.v1beta1.Location>
+      doSomethingOperationCallable;
   private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
   private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
       listLocationsPagedCallable;
@@ -186,7 +186,8 @@ public UnaryCallable<Request, Operation> doSomethingCallable() {
   }
 
   @Override
-  public OperationCallable<Request, Annotation, Metadata> doSomethingOperationCallable() {
+  public OperationCallable<Request, Annotation, com.google.showcase.v1beta1.Location>
+      doSomethingOperationCallable() {
     return doSomethingOperationCallable;
   }
 
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
index f2367700a1..601ad4b35c 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
@@ -35,12 +35,11 @@
 import com.google.cloud.location.GetLocationRequest;
 import com.google.cloud.location.ListLocationsRequest;
 import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
 import com.google.common.collect.ImmutableMap;
 import com.google.longrunning.Operation;
 import com.google.protobuf.TypeRegistry;
 import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Metadata;
+import com.google.showcase.v1beta1.Location;
 import com.google.showcase.v1beta1.Request;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -61,7 +60,7 @@
 public class HttpJsonCollisionsStub extends CollisionsStub {
   private static final TypeRegistry typeRegistry =
       TypeRegistry.newBuilder()
-          .add(Metadata.getDescriptor())
+          .add(Location.getDescriptor())
           .add(Annotation.getDescriptor())
           .build();
 
@@ -98,9 +97,9 @@ public class HttpJsonCollisionsStub extends CollisionsStub {
                       .build())
               .build();
 
-  private static final ApiMethodDescriptor<GetLocationRequest, Location>
+  private static final ApiMethodDescriptor<GetLocationRequest, com.google.cloud.location.Location>
       getLocationMethodDescriptor =
-          ApiMethodDescriptor.<GetLocationRequest, Location>newBuilder()
+          ApiMethodDescriptor.<GetLocationRequest, com.google.cloud.location.Location>newBuilder()
               .setFullMethodName("google.cloud.location.Locations/GetLocation")
               .setHttpMethod("GET")
               .setType(ApiMethodDescriptor.MethodType.UNARY)
@@ -125,8 +124,8 @@ public class HttpJsonCollisionsStub extends CollisionsStub {
                       .setRequestBodyExtractor(request -> null)
                       .build())
               .setResponseParser(
-                  ProtoMessageResponseParser.<Location>newBuilder()
-                      .setDefaultInstance(Location.getDefaultInstance())
+                  ProtoMessageResponseParser.<com.google.cloud.location.Location>newBuilder()
+                      .setDefaultInstance(com.google.cloud.location.Location.getDefaultInstance())
                       .setDefaultTypeRegistry(typeRegistry)
                       .build())
               .build();
@@ -134,7 +133,8 @@ public class HttpJsonCollisionsStub extends CollisionsStub {
   private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
   private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
       listLocationsPagedCallable;
-  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
+  private final UnaryCallable<GetLocationRequest, com.google.cloud.location.Location>
+      getLocationCallable;
 
   private final BackgroundResource backgroundResources;
   private final HttpJsonOperationsStub httpJsonOperationsStub;
@@ -204,11 +204,13 @@ protected HttpJsonCollisionsStub(
                 .setMethodDescriptor(listLocationsMethodDescriptor)
                 .setTypeRegistry(typeRegistry)
                 .build();
-    HttpJsonCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
-        HttpJsonCallSettings.<GetLocationRequest, Location>newBuilder()
-            .setMethodDescriptor(getLocationMethodDescriptor)
-            .setTypeRegistry(typeRegistry)
-            .build();
+    HttpJsonCallSettings<GetLocationRequest, com.google.cloud.location.Location>
+        getLocationTransportSettings =
+            HttpJsonCallSettings
+                .<GetLocationRequest, com.google.cloud.location.Location>newBuilder()
+                .setMethodDescriptor(getLocationMethodDescriptor)
+                .setTypeRegistry(typeRegistry)
+                .build();
 
     this.listLocationsCallable =
         callableFactory.createUnaryCallable(
@@ -248,7 +250,8 @@ public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsC
   }
 
   @Override
-  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
+  public UnaryCallable<GetLocationRequest, com.google.cloud.location.Location>
+      getLocationCallable() {
     return getLocationCallable;
   }
 
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
index 1da72bb40d..a1c6bf43d7 100644
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
+++ b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
@@ -105,7 +105,7 @@ public void doSomethingTest() throws Exception {
         Request.newBuilder()
             .setName("name3373707")
             .setAnnotation(Annotation.newBuilder().build())
-            .setMetadata(Metadata.newBuilder().build())
+            .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
             .build();
 
     Annotation actualResponse = client.doSomethingAsync(request).get();
@@ -117,7 +117,7 @@ public void doSomethingTest() throws Exception {
 
     Assert.assertEquals(request.getName(), actualRequest.getName());
     Assert.assertEquals(request.getAnnotation(), actualRequest.getAnnotation());
-    Assert.assertEquals(request.getMetadata(), actualRequest.getMetadata());
+    Assert.assertEquals(request.getLocation(), actualRequest.getLocation());
     Assert.assertTrue(
         channelProvider.isHeaderSent(
             ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
@@ -134,7 +134,7 @@ public void doSomethingExceptionTest() throws Exception {
           Request.newBuilder()
               .setName("name3373707")
               .setAnnotation(Annotation.newBuilder().build())
-              .setMetadata(Metadata.newBuilder().build())
+              .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
               .build();
       client.doSomethingAsync(request).get();
       Assert.fail("No exception raised");
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
index faf0c18e50..326d872182 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
@@ -25,10 +25,10 @@ public static void registerAllExtensions(
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable;
   static final com.google.protobuf.Descriptors.Descriptor
-    internal_static_google_showcase_v1beta1_Metadata_descriptor;
+    internal_static_google_showcase_v1beta1_Location_descriptor;
   static final 
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-      internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable;
+      internal_static_google_showcase_v1beta1_Location_fieldAccessorTable;
 
   public static com.google.protobuf.Descriptors.FileDescriptor
       getDescriptor() {
@@ -43,13 +43,13 @@ public static void registerAllExtensions(
       "a1\032\027google/api/client.proto\032#google/long" +
       "running/operations.proto\"\205\001\n\007Request\022\014\n\004" +
       "name\030\001 \001(\t\0227\n\nannotation\030\002 \001(\0132#.google." +
-      "showcase.v1beta1.Annotation\0223\n\010metadata\030" +
-      "\003 \001(\0132!.google.showcase.v1beta1.Metadata" +
-      "\"\032\n\nAnnotation\022\014\n\004name\030\001 \001(\t\"\030\n\010Metadata" +
+      "showcase.v1beta1.Annotation\0223\n\010location\030" +
+      "\003 \001(\0132!.google.showcase.v1beta1.Location" +
+      "\"\032\n\nAnnotation\022\014\n\004name\030\001 \001(\t\"\030\n\010Location" +
       "\022\014\n\004name\030\001 \001(\t2\212\001\n\nCollisions\022i\n\013doSomet" +
       "hing\022 .google.showcase.v1beta1.Request\032\035" +
       ".google.longrunning.Operation\"\031\312A\026\n\nAnno" +
-      "tation\022\010Metadata\032\021\312A\016localhost:7469B\037\n\033c" +
+      "tation\022\010Location\032\021\312A\016localhost:7469B\037\n\033c" +
       "om.google.showcase.v1beta1P\001b\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
@@ -63,18 +63,18 @@ public static void registerAllExtensions(
     internal_static_google_showcase_v1beta1_Request_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_google_showcase_v1beta1_Request_descriptor,
-        new java.lang.String[] { "Name", "Annotation", "Metadata", });
+        new java.lang.String[] { "Name", "Annotation", "Location", });
     internal_static_google_showcase_v1beta1_Annotation_descriptor =
       getDescriptor().getMessageTypes().get(1);
     internal_static_google_showcase_v1beta1_Annotation_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_google_showcase_v1beta1_Annotation_descriptor,
         new java.lang.String[] { "Name", });
-    internal_static_google_showcase_v1beta1_Metadata_descriptor =
+    internal_static_google_showcase_v1beta1_Location_descriptor =
       getDescriptor().getMessageTypes().get(2);
-    internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable = new
+    internal_static_google_showcase_v1beta1_Location_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
-        internal_static_google_showcase_v1beta1_Metadata_descriptor,
+        internal_static_google_showcase_v1beta1_Location_descriptor,
         new java.lang.String[] { "Name", });
     com.google.protobuf.ExtensionRegistry registry =
         com.google.protobuf.ExtensionRegistry.newInstance();
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
similarity index 81%
rename from showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
rename to showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
index e86d39b3b1..7e9c559fef 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Metadata.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
@@ -4,18 +4,18 @@
 package com.google.showcase.v1beta1;
 
 /**
- * Protobuf type {@code google.showcase.v1beta1.Metadata}
+ * Protobuf type {@code google.showcase.v1beta1.Location}
  */
-public final class Metadata extends
+public final class Location extends
     com.google.protobuf.GeneratedMessageV3 implements
-    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Metadata)
-    MetadataOrBuilder {
+    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Location)
+    LocationOrBuilder {
 private static final long serialVersionUID = 0L;
-  // Use Metadata.newBuilder() to construct.
-  private Metadata(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+  // Use Location.newBuilder() to construct.
+  private Location(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
     super(builder);
   }
-  private Metadata() {
+  private Location() {
     name_ = "";
   }
 
@@ -23,7 +23,7 @@ private Metadata() {
   @SuppressWarnings({"unused"})
   protected java.lang.Object newInstance(
       UnusedPrivateParameter unused) {
-    return new Metadata();
+    return new Location();
   }
 
   @java.lang.Override
@@ -33,15 +33,15 @@ protected java.lang.Object newInstance(
   }
   public static final com.google.protobuf.Descriptors.Descriptor
       getDescriptor() {
-    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
   }
 
   @java.lang.Override
   protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internalGetFieldAccessorTable() {
-    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable
+    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_fieldAccessorTable
         .ensureFieldAccessorsInitialized(
-            com.google.showcase.v1beta1.Metadata.class, com.google.showcase.v1beta1.Metadata.Builder.class);
+            com.google.showcase.v1beta1.Location.class, com.google.showcase.v1beta1.Location.Builder.class);
   }
 
   public static final int NAME_FIELD_NUMBER = 1;
@@ -122,10 +122,10 @@ public boolean equals(final java.lang.Object obj) {
     if (obj == this) {
      return true;
     }
-    if (!(obj instanceof com.google.showcase.v1beta1.Metadata)) {
+    if (!(obj instanceof com.google.showcase.v1beta1.Location)) {
       return super.equals(obj);
     }
-    com.google.showcase.v1beta1.Metadata other = (com.google.showcase.v1beta1.Metadata) obj;
+    com.google.showcase.v1beta1.Location other = (com.google.showcase.v1beta1.Location) obj;
 
     if (!getName()
         .equals(other.getName())) return false;
@@ -147,69 +147,69 @@ public int hashCode() {
     return hash;
   }
 
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       java.nio.ByteBuffer data)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       java.nio.ByteBuffer data,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       com.google.protobuf.ByteString data)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       com.google.protobuf.ByteString data,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(byte[] data)
+  public static com.google.showcase.v1beta1.Location parseFrom(byte[] data)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       byte[] data,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws com.google.protobuf.InvalidProtocolBufferException {
     return PARSER.parseFrom(data, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(java.io.InputStream input)
+  public static com.google.showcase.v1beta1.Location parseFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Metadata parseDelimitedFrom(java.io.InputStream input)
+  public static com.google.showcase.v1beta1.Location parseDelimitedFrom(java.io.InputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input);
   }
-  public static com.google.showcase.v1beta1.Metadata parseDelimitedFrom(
+  public static com.google.showcase.v1beta1.Location parseDelimitedFrom(
       java.io.InputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       com.google.protobuf.CodedInputStream input)
       throws java.io.IOException {
     return com.google.protobuf.GeneratedMessageV3
         .parseWithIOException(PARSER, input);
   }
-  public static com.google.showcase.v1beta1.Metadata parseFrom(
+  public static com.google.showcase.v1beta1.Location parseFrom(
       com.google.protobuf.CodedInputStream input,
       com.google.protobuf.ExtensionRegistryLite extensionRegistry)
       throws java.io.IOException {
@@ -222,7 +222,7 @@ public static com.google.showcase.v1beta1.Metadata parseFrom(
   public static Builder newBuilder() {
     return DEFAULT_INSTANCE.toBuilder();
   }
-  public static Builder newBuilder(com.google.showcase.v1beta1.Metadata prototype) {
+  public static Builder newBuilder(com.google.showcase.v1beta1.Location prototype) {
     return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
   }
   @java.lang.Override
@@ -238,26 +238,26 @@ protected Builder newBuilderForType(
     return builder;
   }
   /**
-   * Protobuf type {@code google.showcase.v1beta1.Metadata}
+   * Protobuf type {@code google.showcase.v1beta1.Location}
    */
   public static final class Builder extends
       com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
-      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Metadata)
-      com.google.showcase.v1beta1.MetadataOrBuilder {
+      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Location)
+      com.google.showcase.v1beta1.LocationOrBuilder {
     public static final com.google.protobuf.Descriptors.Descriptor
         getDescriptor() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
     }
 
     @java.lang.Override
     protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
         internalGetFieldAccessorTable() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_fieldAccessorTable
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_fieldAccessorTable
           .ensureFieldAccessorsInitialized(
-              com.google.showcase.v1beta1.Metadata.class, com.google.showcase.v1beta1.Metadata.Builder.class);
+              com.google.showcase.v1beta1.Location.class, com.google.showcase.v1beta1.Location.Builder.class);
     }
 
-    // Construct using com.google.showcase.v1beta1.Metadata.newBuilder()
+    // Construct using com.google.showcase.v1beta1.Location.newBuilder()
     private Builder() {
 
     }
@@ -278,17 +278,17 @@ public Builder clear() {
     @java.lang.Override
     public com.google.protobuf.Descriptors.Descriptor
         getDescriptorForType() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Metadata_descriptor;
+      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Location_descriptor;
     }
 
     @java.lang.Override
-    public com.google.showcase.v1beta1.Metadata getDefaultInstanceForType() {
-      return com.google.showcase.v1beta1.Metadata.getDefaultInstance();
+    public com.google.showcase.v1beta1.Location getDefaultInstanceForType() {
+      return com.google.showcase.v1beta1.Location.getDefaultInstance();
     }
 
     @java.lang.Override
-    public com.google.showcase.v1beta1.Metadata build() {
-      com.google.showcase.v1beta1.Metadata result = buildPartial();
+    public com.google.showcase.v1beta1.Location build() {
+      com.google.showcase.v1beta1.Location result = buildPartial();
       if (!result.isInitialized()) {
         throw newUninitializedMessageException(result);
       }
@@ -296,14 +296,14 @@ public com.google.showcase.v1beta1.Metadata build() {
     }
 
     @java.lang.Override
-    public com.google.showcase.v1beta1.Metadata buildPartial() {
-      com.google.showcase.v1beta1.Metadata result = new com.google.showcase.v1beta1.Metadata(this);
+    public com.google.showcase.v1beta1.Location buildPartial() {
+      com.google.showcase.v1beta1.Location result = new com.google.showcase.v1beta1.Location(this);
       if (bitField0_ != 0) { buildPartial0(result); }
       onBuilt();
       return result;
     }
 
-    private void buildPartial0(com.google.showcase.v1beta1.Metadata result) {
+    private void buildPartial0(com.google.showcase.v1beta1.Location result) {
       int from_bitField0_ = bitField0_;
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.name_ = name_;
@@ -344,16 +344,16 @@ public Builder addRepeatedField(
     }
     @java.lang.Override
     public Builder mergeFrom(com.google.protobuf.Message other) {
-      if (other instanceof com.google.showcase.v1beta1.Metadata) {
-        return mergeFrom((com.google.showcase.v1beta1.Metadata)other);
+      if (other instanceof com.google.showcase.v1beta1.Location) {
+        return mergeFrom((com.google.showcase.v1beta1.Location)other);
       } else {
         super.mergeFrom(other);
         return this;
       }
     }
 
-    public Builder mergeFrom(com.google.showcase.v1beta1.Metadata other) {
-      if (other == com.google.showcase.v1beta1.Metadata.getDefaultInstance()) return this;
+    public Builder mergeFrom(com.google.showcase.v1beta1.Location other) {
+      if (other == com.google.showcase.v1beta1.Location.getDefaultInstance()) return this;
       if (!other.getName().isEmpty()) {
         name_ = other.name_;
         bitField0_ |= 0x00000001;
@@ -491,23 +491,23 @@ public final Builder mergeUnknownFields(
     }
 
 
-    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Metadata)
+    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Location)
   }
 
-  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Metadata)
-  private static final com.google.showcase.v1beta1.Metadata DEFAULT_INSTANCE;
+  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Location)
+  private static final com.google.showcase.v1beta1.Location DEFAULT_INSTANCE;
   static {
-    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Metadata();
+    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Location();
   }
 
-  public static com.google.showcase.v1beta1.Metadata getDefaultInstance() {
+  public static com.google.showcase.v1beta1.Location getDefaultInstance() {
     return DEFAULT_INSTANCE;
   }
 
-  private static final com.google.protobuf.Parser<Metadata>
-      PARSER = new com.google.protobuf.AbstractParser<Metadata>() {
+  private static final com.google.protobuf.Parser<Location>
+      PARSER = new com.google.protobuf.AbstractParser<Location>() {
     @java.lang.Override
-    public Metadata parsePartialFrom(
+    public Location parsePartialFrom(
         com.google.protobuf.CodedInputStream input,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws com.google.protobuf.InvalidProtocolBufferException {
@@ -526,17 +526,17 @@ public Metadata parsePartialFrom(
     }
   };
 
-  public static com.google.protobuf.Parser<Metadata> parser() {
+  public static com.google.protobuf.Parser<Location> parser() {
     return PARSER;
   }
 
   @java.lang.Override
-  public com.google.protobuf.Parser<Metadata> getParserForType() {
+  public com.google.protobuf.Parser<Location> getParserForType() {
     return PARSER;
   }
 
   @java.lang.Override
-  public com.google.showcase.v1beta1.Metadata getDefaultInstanceForType() {
+  public com.google.showcase.v1beta1.Location getDefaultInstanceForType() {
     return DEFAULT_INSTANCE;
   }
 
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/MetadataOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
similarity index 89%
rename from showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/MetadataOrBuilder.java
rename to showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
index 6465a7bc9c..37f73be8aa 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/MetadataOrBuilder.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
@@ -3,8 +3,8 @@
 
 package com.google.showcase.v1beta1;
 
-public interface MetadataOrBuilder extends
-    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Metadata)
+public interface LocationOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Location)
     com.google.protobuf.MessageOrBuilder {
 
   /**
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
index c39bb9d868..70ebe31042 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
@@ -109,30 +109,30 @@ public com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder()
     return annotation_ == null ? com.google.showcase.v1beta1.Annotation.getDefaultInstance() : annotation_;
   }
 
-  public static final int METADATA_FIELD_NUMBER = 3;
-  private com.google.showcase.v1beta1.Metadata metadata_;
+  public static final int LOCATION_FIELD_NUMBER = 3;
+  private com.google.showcase.v1beta1.Location location_;
   /**
-   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
-   * @return Whether the metadata field is set.
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return Whether the location field is set.
    */
   @java.lang.Override
-  public boolean hasMetadata() {
-    return metadata_ != null;
+  public boolean hasLocation() {
+    return location_ != null;
   }
   /**
-   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
-   * @return The metadata.
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return The location.
    */
   @java.lang.Override
-  public com.google.showcase.v1beta1.Metadata getMetadata() {
-    return metadata_ == null ? com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
+  public com.google.showcase.v1beta1.Location getLocation() {
+    return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
   }
   /**
-   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
    */
   @java.lang.Override
-  public com.google.showcase.v1beta1.MetadataOrBuilder getMetadataOrBuilder() {
-    return metadata_ == null ? com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
+  public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
+    return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
   }
 
   private byte memoizedIsInitialized = -1;
@@ -155,8 +155,8 @@ public void writeTo(com.google.protobuf.CodedOutputStream output)
     if (annotation_ != null) {
       output.writeMessage(2, getAnnotation());
     }
-    if (metadata_ != null) {
-      output.writeMessage(3, getMetadata());
+    if (location_ != null) {
+      output.writeMessage(3, getLocation());
     }
     getUnknownFields().writeTo(output);
   }
@@ -174,9 +174,9 @@ public int getSerializedSize() {
       size += com.google.protobuf.CodedOutputStream
         .computeMessageSize(2, getAnnotation());
     }
-    if (metadata_ != null) {
+    if (location_ != null) {
       size += com.google.protobuf.CodedOutputStream
-        .computeMessageSize(3, getMetadata());
+        .computeMessageSize(3, getLocation());
     }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
@@ -200,10 +200,10 @@ public boolean equals(final java.lang.Object obj) {
       if (!getAnnotation()
           .equals(other.getAnnotation())) return false;
     }
-    if (hasMetadata() != other.hasMetadata()) return false;
-    if (hasMetadata()) {
-      if (!getMetadata()
-          .equals(other.getMetadata())) return false;
+    if (hasLocation() != other.hasLocation()) return false;
+    if (hasLocation()) {
+      if (!getLocation()
+          .equals(other.getLocation())) return false;
     }
     if (!getUnknownFields().equals(other.getUnknownFields())) return false;
     return true;
@@ -222,9 +222,9 @@ public int hashCode() {
       hash = (37 * hash) + ANNOTATION_FIELD_NUMBER;
       hash = (53 * hash) + getAnnotation().hashCode();
     }
-    if (hasMetadata()) {
-      hash = (37 * hash) + METADATA_FIELD_NUMBER;
-      hash = (53 * hash) + getMetadata().hashCode();
+    if (hasLocation()) {
+      hash = (37 * hash) + LOCATION_FIELD_NUMBER;
+      hash = (53 * hash) + getLocation().hashCode();
     }
     hash = (29 * hash) + getUnknownFields().hashCode();
     memoizedHashCode = hash;
@@ -361,10 +361,10 @@ public Builder clear() {
         annotationBuilder_.dispose();
         annotationBuilder_ = null;
       }
-      metadata_ = null;
-      if (metadataBuilder_ != null) {
-        metadataBuilder_.dispose();
-        metadataBuilder_ = null;
+      location_ = null;
+      if (locationBuilder_ != null) {
+        locationBuilder_.dispose();
+        locationBuilder_ = null;
       }
       return this;
     }
@@ -408,9 +408,9 @@ private void buildPartial0(com.google.showcase.v1beta1.Request result) {
             : annotationBuilder_.build();
       }
       if (((from_bitField0_ & 0x00000004) != 0)) {
-        result.metadata_ = metadataBuilder_ == null
-            ? metadata_
-            : metadataBuilder_.build();
+        result.location_ = locationBuilder_ == null
+            ? location_
+            : locationBuilder_.build();
       }
     }
 
@@ -466,8 +466,8 @@ public Builder mergeFrom(com.google.showcase.v1beta1.Request other) {
       if (other.hasAnnotation()) {
         mergeAnnotation(other.getAnnotation());
       }
-      if (other.hasMetadata()) {
-        mergeMetadata(other.getMetadata());
+      if (other.hasLocation()) {
+        mergeLocation(other.getLocation());
       }
       this.mergeUnknownFields(other.getUnknownFields());
       onChanged();
@@ -509,7 +509,7 @@ public Builder mergeFrom(
             } // case 18
             case 26: {
               input.readMessage(
-                  getMetadataFieldBuilder().getBuilder(),
+                  getLocationFieldBuilder().getBuilder(),
                   extensionRegistry);
               bitField0_ |= 0x00000004;
               break;
@@ -722,123 +722,123 @@ public com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder()
       return annotationBuilder_;
     }
 
-    private com.google.showcase.v1beta1.Metadata metadata_;
+    private com.google.showcase.v1beta1.Location location_;
     private com.google.protobuf.SingleFieldBuilderV3<
-        com.google.showcase.v1beta1.Metadata, com.google.showcase.v1beta1.Metadata.Builder, com.google.showcase.v1beta1.MetadataOrBuilder> metadataBuilder_;
+        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> locationBuilder_;
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
-     * @return Whether the metadata field is set.
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * @return Whether the location field is set.
      */
-    public boolean hasMetadata() {
+    public boolean hasLocation() {
       return ((bitField0_ & 0x00000004) != 0);
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
-     * @return The metadata.
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
+     * @return The location.
      */
-    public com.google.showcase.v1beta1.Metadata getMetadata() {
-      if (metadataBuilder_ == null) {
-        return metadata_ == null ? com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
+    public com.google.showcase.v1beta1.Location getLocation() {
+      if (locationBuilder_ == null) {
+        return location_ == null ? com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
       } else {
-        return metadataBuilder_.getMessage();
+        return locationBuilder_.getMessage();
       }
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
-    public Builder setMetadata(com.google.showcase.v1beta1.Metadata value) {
-      if (metadataBuilder_ == null) {
+    public Builder setLocation(com.google.showcase.v1beta1.Location value) {
+      if (locationBuilder_ == null) {
         if (value == null) {
           throw new NullPointerException();
         }
-        metadata_ = value;
+        location_ = value;
       } else {
-        metadataBuilder_.setMessage(value);
+        locationBuilder_.setMessage(value);
       }
       bitField0_ |= 0x00000004;
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
-    public Builder setMetadata(
-        com.google.showcase.v1beta1.Metadata.Builder builderForValue) {
-      if (metadataBuilder_ == null) {
-        metadata_ = builderForValue.build();
+    public Builder setLocation(
+        com.google.showcase.v1beta1.Location.Builder builderForValue) {
+      if (locationBuilder_ == null) {
+        location_ = builderForValue.build();
       } else {
-        metadataBuilder_.setMessage(builderForValue.build());
+        locationBuilder_.setMessage(builderForValue.build());
       }
       bitField0_ |= 0x00000004;
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
-    public Builder mergeMetadata(com.google.showcase.v1beta1.Metadata value) {
-      if (metadataBuilder_ == null) {
+    public Builder mergeLocation(com.google.showcase.v1beta1.Location value) {
+      if (locationBuilder_ == null) {
         if (((bitField0_ & 0x00000004) != 0) &&
-          metadata_ != null &&
-          metadata_ != com.google.showcase.v1beta1.Metadata.getDefaultInstance()) {
-          getMetadataBuilder().mergeFrom(value);
+          location_ != null &&
+          location_ != com.google.showcase.v1beta1.Location.getDefaultInstance()) {
+          getLocationBuilder().mergeFrom(value);
         } else {
-          metadata_ = value;
+          location_ = value;
         }
       } else {
-        metadataBuilder_.mergeFrom(value);
+        locationBuilder_.mergeFrom(value);
       }
       bitField0_ |= 0x00000004;
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
-    public Builder clearMetadata() {
+    public Builder clearLocation() {
       bitField0_ = (bitField0_ & ~0x00000004);
-      metadata_ = null;
-      if (metadataBuilder_ != null) {
-        metadataBuilder_.dispose();
-        metadataBuilder_ = null;
+      location_ = null;
+      if (locationBuilder_ != null) {
+        locationBuilder_.dispose();
+        locationBuilder_ = null;
       }
       onChanged();
       return this;
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
-    public com.google.showcase.v1beta1.Metadata.Builder getMetadataBuilder() {
+    public com.google.showcase.v1beta1.Location.Builder getLocationBuilder() {
       bitField0_ |= 0x00000004;
       onChanged();
-      return getMetadataFieldBuilder().getBuilder();
+      return getLocationFieldBuilder().getBuilder();
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
-    public com.google.showcase.v1beta1.MetadataOrBuilder getMetadataOrBuilder() {
-      if (metadataBuilder_ != null) {
-        return metadataBuilder_.getMessageOrBuilder();
+    public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
+      if (locationBuilder_ != null) {
+        return locationBuilder_.getMessageOrBuilder();
       } else {
-        return metadata_ == null ?
-            com.google.showcase.v1beta1.Metadata.getDefaultInstance() : metadata_;
+        return location_ == null ?
+            com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
       }
     }
     /**
-     * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+     * <code>.google.showcase.v1beta1.Location location = 3;</code>
      */
     private com.google.protobuf.SingleFieldBuilderV3<
-        com.google.showcase.v1beta1.Metadata, com.google.showcase.v1beta1.Metadata.Builder, com.google.showcase.v1beta1.MetadataOrBuilder> 
-        getMetadataFieldBuilder() {
-      if (metadataBuilder_ == null) {
-        metadataBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
-            com.google.showcase.v1beta1.Metadata, com.google.showcase.v1beta1.Metadata.Builder, com.google.showcase.v1beta1.MetadataOrBuilder>(
-                getMetadata(),
+        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> 
+        getLocationFieldBuilder() {
+      if (locationBuilder_ == null) {
+        locationBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder>(
+                getLocation(),
                 getParentForChildren(),
                 isClean());
-        metadata_ = null;
+        location_ = null;
       }
-      return metadataBuilder_;
+      return locationBuilder_;
     }
     @java.lang.Override
     public final Builder setUnknownFields(
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
index fde53e1f8e..a8febedd64 100644
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
+++ b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
@@ -35,17 +35,17 @@ public interface RequestOrBuilder extends
   com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder();
 
   /**
-   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
-   * @return Whether the metadata field is set.
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return Whether the location field is set.
    */
-  boolean hasMetadata();
+  boolean hasLocation();
   /**
-   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
-   * @return The metadata.
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
+   * @return The location.
    */
-  com.google.showcase.v1beta1.Metadata getMetadata();
+  com.google.showcase.v1beta1.Location getLocation();
   /**
-   * <code>.google.showcase.v1beta1.Metadata metadata = 3;</code>
+   * <code>.google.showcase.v1beta1.Location location = 3;</code>
    */
-  com.google.showcase.v1beta1.MetadataOrBuilder getMetadataOrBuilder();
+  com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder();
 }

From b73d72aad94f0250841c1c8fcb0c2d3144237eea Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Thu, 1 Jun 2023 10:05:40 -0400
Subject: [PATCH 10/18] test: add service description to new test proto

---
 showcase/gapic-showcase-extended/proto/collisions.proto    | 2 ++
 .../java/com/google/showcase/v1beta1/CollisionsClient.java | 7 +++++--
 .../java/com/google/showcase/v1beta1/package-info.java     | 3 +++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/showcase/gapic-showcase-extended/proto/collisions.proto b/showcase/gapic-showcase-extended/proto/collisions.proto
index 009fcd77f9..aaf2f92f9b 100644
--- a/showcase/gapic-showcase-extended/proto/collisions.proto
+++ b/showcase/gapic-showcase-extended/proto/collisions.proto
@@ -22,6 +22,8 @@ package google.showcase.v1beta1;
 option java_package = "com.google.showcase.v1beta1";
 option java_multiple_files = true;
 
+// This service exercises scenarios where short names of types
+// exhibit ambiguity or collide with other types
 service Collisions {
 
   option (google.api.default_host) = "localhost:7469";
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
index 6a82edbe55..03e7d91f3f 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
@@ -43,8 +43,11 @@
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
- * This class provides the ability to make remote calls to the backing service through method calls
- * that map to API methods. Sample code to get started:
+ * Service Description: This service exercises scenarios where short names of types exhibit
+ * ambiguity or collide with other types
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
  *
  * <pre>{@code
  * // This snippet has been automatically generated and should be regarded as a code template only.
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
index f0cd9d4d09..9f49d78924 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
@@ -158,6 +158,9 @@
  *
  * <p>======================= CollisionsClient =======================
  *
+ * <p>Service Description: This service exercises scenarios where short names of types exhibit
+ * ambiguity or collide with other types
+ *
  * <p>Sample for CollisionsClient:
  *
  * <pre>{@code

From de5e9c39c0d757200bddba4878c533f3104a8df3 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Tue, 13 Jun 2023 09:50:12 -0400
Subject: [PATCH 11/18] chore: refactor type name matching into private helper

---
 .../generator/gapic/protoparser/Parser.java   | 38 +++++++++----------
 1 file changed, 17 insertions(+), 21 deletions(-)

diff --git a/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java b/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
index c1c819214e..43f5f830fc 100644
--- a/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
+++ b/gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
@@ -780,6 +780,21 @@ static List<Method> parseMethods(
     return methods;
   }
 
+  private static String fetchTypeFullName(String typeName, MethodDescriptor methodDescriptor) {
+    // When provided type name is fully qualified, return as-is
+    // When only shortname is provided, assume same proto package as method (See
+    // https://aip.dev/151)
+    int lastDotIndex = typeName.lastIndexOf('.');
+    boolean isResponseTypeNameShortOnly = lastDotIndex < 0;
+    String responseTypeShortName =
+        lastDotIndex >= 0 ? typeName.substring(lastDotIndex + 1) : typeName;
+    String typeFullName =
+        isResponseTypeNameShortOnly
+            ? methodDescriptor.getFile().getPackage() + "." + responseTypeShortName
+            : typeName;
+    return typeFullName;
+  }
+
   @VisibleForTesting
   static LongrunningOperation parseLro(
       String servicePackage, MethodDescriptor methodDescriptor, Map<String, Message> messageTypes) {
@@ -820,27 +835,8 @@ static LongrunningOperation parseLro(
     Message responseMessage = null;
     Message metadataMessage = null;
 
-    int lastDotIndex = responseTypeName.lastIndexOf('.');
-    boolean isResponseTypeNameShortOnly = lastDotIndex < 0;
-    String responseTypeShortName =
-        lastDotIndex >= 0 ? responseTypeName.substring(lastDotIndex + 1) : responseTypeName;
-    // When only shortname is provided, match on same proto package as method (See
-    // https://aip.dev/151)
-    String responseTypeFullName =
-        isResponseTypeNameShortOnly
-            ? methodDescriptor.getFile().getPackage() + "." + responseTypeShortName
-            : responseTypeName;
-
-    lastDotIndex = metadataTypeName.lastIndexOf('.');
-    boolean isMetadataTypeNameShortOnly = lastDotIndex < 0;
-    String metadataTypeShortName =
-        lastDotIndex >= 0 ? metadataTypeName.substring(lastDotIndex + 1) : metadataTypeName;
-    // When only shortname is provided, match on same proto package as method (See
-    // https://aip.dev/151)
-    String metadataTypeFullName =
-        isMetadataTypeNameShortOnly
-            ? methodDescriptor.getFile().getPackage() + "." + metadataTypeShortName
-            : metadataTypeName;
+    String responseTypeFullName = fetchTypeFullName(responseTypeName, methodDescriptor);
+    String metadataTypeFullName = fetchTypeFullName(metadataTypeName, methodDescriptor);
 
     // The messageTypes map keys to the Java fully-qualified name.
     for (Map.Entry<String, Message> messageEntry : messageTypes.entrySet()) {

From b7952a4cde4485258052e0ae0fc172778188ec18 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Tue, 13 Jun 2023 09:58:35 -0400
Subject: [PATCH 12/18] test: turn off showcase-extended setup

---
 showcase/BUILD.bazel                          | 25 +++++++++----------
 .../gapic-showcase-extended/proto/BUILD.bazel | 22 ++++++++--------
 showcase/scripts/update.sh                    |  4 +--
 showcase/scripts/verify.sh                    |  4 +--
 4 files changed, 27 insertions(+), 28 deletions(-)

diff --git a/showcase/BUILD.bazel b/showcase/BUILD.bazel
index e83cd1fe90..5fb79c83a2 100644
--- a/showcase/BUILD.bazel
+++ b/showcase/BUILD.bazel
@@ -17,7 +17,7 @@ proto_library_with_info(
     name = "showcase_proto_with_info",
     deps = [
         "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_proto",
-        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
+        # "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
         "@com_google_googleapis//google/cloud:common_resources_proto",
         "@com_google_googleapis//google/cloud/location:location_proto"
     ],
@@ -27,7 +27,7 @@ java_proto_library(
     name = "showcase_java_proto",
     deps = [
         "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_proto",
-        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended"
+        # "//showcase/gapic-showcase-extended/proto:showcase_proto_extended"
 ],
 )
 
@@ -37,13 +37,13 @@ java_grpc_library(
     deps = [":showcase_java_proto"],
 )
 
-java_grpc_library(
-    name = "showcase_java_grpc_extended",
-    srcs = [
-        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
-    ],
-    deps = [":showcase_java_proto"],
-)
+# java_grpc_library(
+#     name = "showcase_java_grpc_extended",
+#     srcs = [
+#         "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
+#     ],
+#     deps = [":showcase_java_proto"],
+# )
 
 java_gapic_library(
     name = "showcase_java_gapic",
@@ -56,7 +56,7 @@ java_gapic_library(
     service_yaml = "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_v1beta1.yaml",
     test_deps = [
         ":showcase_java_grpc",
-        ":showcase_java_grpc_extended",
+        # ":showcase_java_grpc_extended",
         "@com_google_googleapis//google/cloud/location:location_java_grpc"
     ],
     transport = "grpc+rest",
@@ -121,10 +121,10 @@ sh_binary(
 # GRPC Showcase : Update and Verify
 GRPC_DATA = [
     "libshowcase_java_grpc-src.jar",
-    "libshowcase_java_grpc_extended-src.jar",
+    # "libshowcase_java_grpc_extended-src.jar",
     ":grpc_gapic_showcase_files",
     ":showcase_java_grpc",
-    ":showcase_java_grpc_extended"
+    # ":showcase_java_grpc_extended"
 ]
 
 sh_binary(
@@ -146,7 +146,6 @@ PROTO_DATA = [
     "proto-google-cloud-showcase-v1beta1-java.tar.gz",
     ":proto_gapic_showcase_files",
     ":showcase_java_proto",
-    # ":showcase_java_proto_extended",
 ]
 
 sh_binary(
diff --git a/showcase/gapic-showcase-extended/proto/BUILD.bazel b/showcase/gapic-showcase-extended/proto/BUILD.bazel
index 91de49e161..ec22f33770 100644
--- a/showcase/gapic-showcase-extended/proto/BUILD.bazel
+++ b/showcase/gapic-showcase-extended/proto/BUILD.bazel
@@ -28,14 +28,14 @@ package(default_visibility = ["//visibility:public"])
 # gapic-showcase project is used to test the generated client behavior with a showcase server
 # gapic-showcase-extension project is used to test the generator's behavior
 
-proto_library(
-    name = "showcase_proto_extended",
-    srcs = [
-        ":collisions.proto",
-        ":wicked.proto",
-    ],
-    deps = [
-        "@com_google_googleapis//google/api:client_proto",
-        "@com_google_googleapis//google/longrunning:operations_proto",
-    ],
-)
+# proto_library(
+#     name = "showcase_proto_extended",
+#     srcs = [
+#         ":collisions.proto",
+#         ":wicked.proto",
+#     ],
+#     deps = [
+#         "@com_google_googleapis//google/api:client_proto",
+#         "@com_google_googleapis//google/longrunning:operations_proto",
+#     ],
+# )
diff --git a/showcase/scripts/update.sh b/showcase/scripts/update.sh
index ad94efb740..a0e6547ed5 100755
--- a/showcase/scripts/update.sh
+++ b/showcase/scripts/update.sh
@@ -40,13 +40,13 @@ case $1 in
   grpc)
     GRPC_PROJECT_DIR=grpc-gapic-showcase-v1beta1
     GRPC_JAR=$(find . -name 'libshowcase_java_grpc-src.jar')
-    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
+    # GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
     clear_existing $GRPC_PROJECT_DIR
     create_unpack_dir grpc_unpacked
     GRPC_UNPACK_DIR=$PWD
 
     jar xf "$BAZEL_ROOT/$GRPC_JAR"
-    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
+    # jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
     cd "$BUILD_WORKSPACE_DIRECTORY/showcase/$GRPC_PROJECT_DIR"
     mkdir -p ./src/main/java/com
     cp -r "$GRPC_UNPACK_DIR"/com/* ./src/main/java/com
diff --git a/showcase/scripts/verify.sh b/showcase/scripts/verify.sh
index 6c4865b84c..b7827cb72d 100755
--- a/showcase/scripts/verify.sh
+++ b/showcase/scripts/verify.sh
@@ -39,12 +39,12 @@ case $1 in
   grpc)
     GRPC_PROJECT_DIR=grpc-gapic-showcase-v1beta1
     GRPC_JAR=$(find . -name 'libshowcase_java_grpc-src.jar')
-    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
+    # GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
     create_unpack_dir grpc_unpacked
     GRPC_UNPACK_DIR=$PWD
 
     jar xf "$BAZEL_ROOT/$GRPC_JAR"
-    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
+    # jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
     delete_unneeded
     diff -ru "$SHOWCASE_DIR/$GRPC_PROJECT_DIR"/src/main/java/com "$GRPC_UNPACK_DIR"/com
     ;;

From 69e3a27f810572e282ae8196c8622307d4855b7b Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Tue, 13 Jun 2023 10:00:46 -0400
Subject: [PATCH 13/18] test: remove golden files previously generated by
 showcase-extended setup

---
 .../SyncCreateSetCredentialsProvider.java     |  44 -
 .../SyncCreateSetCredentialsProvider1.java    |  39 -
 .../create/SyncCreateSetEndpoint.java         |  41 -
 .../dosomething/AsyncDoSomething.java         |  52 -
 .../dosomething/AsyncDoSomethingLRO.java      |  52 -
 .../dosomething/SyncDoSomething.java          |  48 -
 .../getlocation/AsyncGetLocation.java         |  45 -
 .../getlocation/SyncGetLocation.java          |  42 -
 .../listlocations/AsyncListLocations.java     |  54 --
 .../AsyncListLocationsPaged.java              |  61 --
 .../listlocations/SyncListLocations.java      |  50 -
 .../getlocation/SyncGetLocation.java          |  48 -
 .../getlocation/SyncGetLocation.java          |  48 -
 .../craftevilplan/SyncCraftEvilPlan.java      |  48 -
 .../AsyncBrainstormEvilPlans.java             |  49 -
 .../craftevilplan/AsyncCraftEvilPlan.java     |  46 -
 .../craftevilplan/SyncCraftEvilPlan.java      |  43 -
 .../SyncCreateSetCredentialsProvider.java     |  44 -
 .../SyncCreateSetCredentialsProvider1.java    |  39 -
 .../wicked/create/SyncCreateSetEndpoint.java  |  40 -
 .../wicked/getlocation/AsyncGetLocation.java  |  45 -
 .../wicked/getlocation/SyncGetLocation.java   |  42 -
 .../listlocations/AsyncListLocations.java     |  53 -
 .../AsyncListLocationsPaged.java              |  61 --
 .../listlocations/SyncListLocations.java      |  50 -
 .../AsyncPersuadeEvilPlan.java                |  63 --
 .../craftevilplan/SyncCraftEvilPlan.java      |  48 -
 .../showcase/v1beta1/CollisionsClient.java    | 552 -----------
 .../showcase/v1beta1/CollisionsSettings.java  | 249 -----
 .../google/showcase/v1beta1/WickedClient.java | 554 -----------
 .../showcase/v1beta1/WickedSettings.java      | 256 -----
 .../showcase/v1beta1/gapic_metadata.json      |  42 -
 .../google/showcase/v1beta1/package-info.java |  41 -
 .../showcase/v1beta1/stub/CollisionsStub.java |  77 --
 .../v1beta1/stub/CollisionsStubSettings.java  | 487 ----------
 .../stub/GrpcCollisionsCallableFactory.java   | 115 ---
 .../v1beta1/stub/GrpcCollisionsStub.java      | 245 -----
 .../stub/GrpcWickedCallableFactory.java       | 115 ---
 .../showcase/v1beta1/stub/GrpcWickedStub.java | 274 ------
 .../HttpJsonCollisionsCallableFactory.java    | 105 --
 .../v1beta1/stub/HttpJsonCollisionsStub.java  | 299 ------
 .../stub/HttpJsonWickedCallableFactory.java   | 105 --
 .../v1beta1/stub/HttpJsonWickedStub.java      | 274 ------
 .../showcase/v1beta1/stub/WickedStub.java     |  71 --
 .../v1beta1/stub/WickedStubSettings.java      | 458 ---------
 .../v1beta1/CollisionsClientHttpJsonTest.java | 204 ----
 .../v1beta1/CollisionsClientTest.java         | 248 -----
 .../showcase/v1beta1/MockCollisions.java      |  59 --
 .../showcase/v1beta1/MockCollisionsImpl.java  |  81 --
 .../google/showcase/v1beta1/MockWicked.java   |  59 --
 .../showcase/v1beta1/MockWickedImpl.java      | 154 ---
 .../v1beta1/WickedClientHttpJsonTest.java     | 216 -----
 .../showcase/v1beta1/WickedClientTest.java    | 326 -------
 .../showcase/v1beta1/CollisionsGrpc.java      | 293 ------
 .../google/showcase/v1beta1/WickedGrpc.java   | 409 --------
 .../google/showcase/v1beta1/Annotation.java   | 544 -----------
 .../showcase/v1beta1/AnnotationOrBuilder.java |  21 -
 .../v1beta1/CollisionsOuterClass.java         |  90 --
 .../google/showcase/v1beta1/EvilRequest.java  | 544 -----------
 .../v1beta1/EvilRequestOrBuilder.java         |  21 -
 .../google/showcase/v1beta1/EvilResponse.java | 544 -----------
 .../v1beta1/EvilResponseOrBuilder.java        |  21 -
 .../com/google/showcase/v1beta1/Location.java | 544 -----------
 .../showcase/v1beta1/LocationOrBuilder.java   |  21 -
 .../com/google/showcase/v1beta1/Request.java  | 906 ------------------
 .../showcase/v1beta1/RequestOrBuilder.java    |  51 -
 .../showcase/v1beta1/WickedOuterClass.java    |  79 --
 67 files changed, 11049 deletions(-)
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
 delete mode 100644 showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
 delete mode 100644 showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
 delete mode 100644 showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
 delete mode 100644 showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java
 delete mode 100644 showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
 delete mode 100644 showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java

diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
deleted file mode 100644
index 2bc2cd0be7..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider_sync]
-import com.google.api.gax.core.FixedCredentialsProvider;
-import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.CollisionsSettings;
-import com.google.showcase.v1beta1.myCredentials;
-
-public class SyncCreateSetCredentialsProvider {
-
-  public static void main(String[] args) throws Exception {
-    syncCreateSetCredentialsProvider();
-  }
-
-  public static void syncCreateSetCredentialsProvider() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    CollisionsSettings collisionsSettings =
-        CollisionsSettings.newBuilder()
-            .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
-            .build();
-    CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
deleted file mode 100644
index d09b8ca88d..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetCredentialsProvider1.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider1_sync]
-import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.CollisionsSettings;
-
-public class SyncCreateSetCredentialsProvider1 {
-
-  public static void main(String[] args) throws Exception {
-    syncCreateSetCredentialsProvider1();
-  }
-
-  public static void syncCreateSetCredentialsProvider1() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    CollisionsSettings collisionsSettings = CollisionsSettings.newHttpJsonBuilder().build();
-    CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_Create_SetCredentialsProvider1_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
deleted file mode 100644
index 15627c4ae9..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/create/SyncCreateSetEndpoint.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_Create_SetEndpoint_sync]
-import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.CollisionsSettings;
-import com.google.showcase.v1beta1.myEndpoint;
-
-public class SyncCreateSetEndpoint {
-
-  public static void main(String[] args) throws Exception {
-    syncCreateSetEndpoint();
-  }
-
-  public static void syncCreateSetEndpoint() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    CollisionsSettings collisionsSettings =
-        CollisionsSettings.newBuilder().setEndpoint(myEndpoint).build();
-    CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_Create_SetEndpoint_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
deleted file mode 100644
index ccfb6d757b..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomething.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_DoSomething_async]
-import com.google.api.core.ApiFuture;
-import com.google.longrunning.Operation;
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Location;
-import com.google.showcase.v1beta1.Request;
-
-public class AsyncDoSomething {
-
-  public static void main(String[] args) throws Exception {
-    asyncDoSomething();
-  }
-
-  public static void asyncDoSomething() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      Request request =
-          Request.newBuilder()
-              .setName("name3373707")
-              .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(Location.newBuilder().build())
-              .build();
-      ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
-      // Do something.
-      Operation response = future.get();
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_DoSomething_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
deleted file mode 100644
index 6f87f4612b..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/AsyncDoSomethingLRO.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_DoSomething_LRO_async]
-import com.google.api.gax.longrunning.OperationFuture;
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Location;
-import com.google.showcase.v1beta1.Request;
-
-public class AsyncDoSomethingLRO {
-
-  public static void main(String[] args) throws Exception {
-    asyncDoSomethingLRO();
-  }
-
-  public static void asyncDoSomethingLRO() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      Request request =
-          Request.newBuilder()
-              .setName("name3373707")
-              .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(Location.newBuilder().build())
-              .build();
-      OperationFuture<Annotation, Location> future =
-          collisionsClient.doSomethingOperationCallable().futureCall(request);
-      // Do something.
-      Annotation response = future.get();
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_DoSomething_LRO_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
deleted file mode 100644
index 8512379c1b..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/dosomething/SyncDoSomething.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_DoSomething_sync]
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.CollisionsClient;
-import com.google.showcase.v1beta1.Location;
-import com.google.showcase.v1beta1.Request;
-
-public class SyncDoSomething {
-
-  public static void main(String[] args) throws Exception {
-    syncDoSomething();
-  }
-
-  public static void syncDoSomething() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      Request request =
-          Request.newBuilder()
-              .setName("name3373707")
-              .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(Location.newBuilder().build())
-              .build();
-      Annotation response = collisionsClient.doSomethingAsync(request).get();
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_DoSomething_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
deleted file mode 100644
index 903fcc6b26..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/AsyncGetLocation.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_GetLocation_async]
-import com.google.api.core.ApiFuture;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.CollisionsClient;
-
-public class AsyncGetLocation {
-
-  public static void main(String[] args) throws Exception {
-    asyncGetLocation();
-  }
-
-  public static void asyncGetLocation() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-      ApiFuture<Location> future = collisionsClient.getLocationCallable().futureCall(request);
-      // Do something.
-      Location response = future.get();
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_GetLocation_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
deleted file mode 100644
index 468f9a120f..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/getlocation/SyncGetLocation.java
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_GetLocation_sync]
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.CollisionsClient;
-
-public class SyncGetLocation {
-
-  public static void main(String[] args) throws Exception {
-    syncGetLocation();
-  }
-
-  public static void syncGetLocation() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-      Location response = collisionsClient.getLocation(request);
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
deleted file mode 100644
index e3231849c0..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocations.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_ListLocations_async]
-import com.google.api.core.ApiFuture;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.CollisionsClient;
-
-public class AsyncListLocations {
-
-  public static void main(String[] args) throws Exception {
-    asyncListLocations();
-  }
-
-  public static void asyncListLocations() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<Location> future =
-          collisionsClient.listLocationsPagedCallable().futureCall(request);
-      // Do something.
-      for (Location element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_ListLocations_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
deleted file mode 100644
index 1eca857f08..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/AsyncListLocationsPaged.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_ListLocations_Paged_async]
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.base.Strings;
-import com.google.showcase.v1beta1.CollisionsClient;
-
-public class AsyncListLocationsPaged {
-
-  public static void main(String[] args) throws Exception {
-    asyncListLocationsPaged();
-  }
-
-  public static void asyncListLocationsPaged() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        ListLocationsResponse response = collisionsClient.listLocationsCallable().call(request);
-        for (Location element : response.getLocationsList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_ListLocations_Paged_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
deleted file mode 100644
index 539b2c6f3b..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisions/listlocations/SyncListLocations.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Collisions_ListLocations_sync]
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.CollisionsClient;
-
-public class SyncListLocations {
-
-  public static void main(String[] args) throws Exception {
-    syncListLocations();
-  }
-
-  public static void syncListLocations() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (Location element : collisionsClient.listLocations(request).iterateAll()) {
-        // doThingsWith(element);
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Collisions_ListLocations_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
deleted file mode 100644
index 355ed7f1c5..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/collisionssettings/getlocation/SyncGetLocation.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_CollisionsSettings_GetLocation_sync]
-import com.google.showcase.v1beta1.CollisionsSettings;
-import java.time.Duration;
-
-public class SyncGetLocation {
-
-  public static void main(String[] args) throws Exception {
-    syncGetLocation();
-  }
-
-  public static void syncGetLocation() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    CollisionsSettings.Builder collisionsSettingsBuilder = CollisionsSettings.newBuilder();
-    collisionsSettingsBuilder
-        .getLocationSettings()
-        .setRetrySettings(
-            collisionsSettingsBuilder
-                .getLocationSettings()
-                .getRetrySettings()
-                .toBuilder()
-                .setTotalTimeout(Duration.ofSeconds(30))
-                .build());
-    CollisionsSettings collisionsSettings = collisionsSettingsBuilder.build();
-  }
-}
-// [END localhost7469_v1beta1_generated_CollisionsSettings_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
deleted file mode 100644
index 781c3f4653..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/collisionsstubsettings/getlocation/SyncGetLocation.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub.samples;
-
-// [START localhost7469_v1beta1_generated_CollisionsStubSettings_GetLocation_sync]
-import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
-import java.time.Duration;
-
-public class SyncGetLocation {
-
-  public static void main(String[] args) throws Exception {
-    syncGetLocation();
-  }
-
-  public static void syncGetLocation() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    CollisionsStubSettings.Builder collisionsSettingsBuilder = CollisionsStubSettings.newBuilder();
-    collisionsSettingsBuilder
-        .getLocationSettings()
-        .setRetrySettings(
-            collisionsSettingsBuilder
-                .getLocationSettings()
-                .getRetrySettings()
-                .toBuilder()
-                .setTotalTimeout(Duration.ofSeconds(30))
-                .build());
-    CollisionsStubSettings collisionsSettings = collisionsSettingsBuilder.build();
-  }
-}
-// [END localhost7469_v1beta1_generated_CollisionsStubSettings_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
deleted file mode 100644
index d37ea2865c..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/stub/wickedstubsettings/craftevilplan/SyncCraftEvilPlan.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub.samples;
-
-// [START localhost7469_v1beta1_generated_WickedStubSettings_CraftEvilPlan_sync]
-import com.google.showcase.v1beta1.stub.WickedStubSettings;
-import java.time.Duration;
-
-public class SyncCraftEvilPlan {
-
-  public static void main(String[] args) throws Exception {
-    syncCraftEvilPlan();
-  }
-
-  public static void syncCraftEvilPlan() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    WickedStubSettings.Builder wickedSettingsBuilder = WickedStubSettings.newBuilder();
-    wickedSettingsBuilder
-        .craftEvilPlanSettings()
-        .setRetrySettings(
-            wickedSettingsBuilder
-                .craftEvilPlanSettings()
-                .getRetrySettings()
-                .toBuilder()
-                .setTotalTimeout(Duration.ofSeconds(30))
-                .build());
-    WickedStubSettings wickedSettings = wickedSettingsBuilder.build();
-  }
-}
-// [END localhost7469_v1beta1_generated_WickedStubSettings_CraftEvilPlan_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
deleted file mode 100644
index a7a9a72437..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/brainstormevilplans/AsyncBrainstormEvilPlans.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_BrainstormEvilPlans_async]
-import com.google.api.gax.rpc.BidiStream;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class AsyncBrainstormEvilPlans {
-
-  public static void main(String[] args) throws Exception {
-    asyncBrainstormEvilPlans();
-  }
-
-  public static void asyncBrainstormEvilPlans() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      BidiStream<EvilRequest, EvilResponse> bidiStream =
-          wickedClient.brainstormEvilPlansCallable().call();
-      EvilRequest request =
-          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-      bidiStream.send(request);
-      for (EvilResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_BrainstormEvilPlans_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
deleted file mode 100644
index b7133bcc21..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/AsyncCraftEvilPlan.java
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_async]
-import com.google.api.core.ApiFuture;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class AsyncCraftEvilPlan {
-
-  public static void main(String[] args) throws Exception {
-    asyncCraftEvilPlan();
-  }
-
-  public static void asyncCraftEvilPlan() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      EvilRequest request =
-          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-      ApiFuture<EvilResponse> future = wickedClient.craftEvilPlanCallable().futureCall(request);
-      // Do something.
-      EvilResponse response = future.get();
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
deleted file mode 100644
index 67d75d0f2a..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/craftevilplan/SyncCraftEvilPlan.java
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_sync]
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class SyncCraftEvilPlan {
-
-  public static void main(String[] args) throws Exception {
-    syncCraftEvilPlan();
-  }
-
-  public static void syncCraftEvilPlan() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      EvilRequest request =
-          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-      EvilResponse response = wickedClient.craftEvilPlan(request);
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_CraftEvilPlan_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
deleted file mode 100644
index 9af0aaa741..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider_sync]
-import com.google.api.gax.core.FixedCredentialsProvider;
-import com.google.showcase.v1beta1.WickedClient;
-import com.google.showcase.v1beta1.WickedSettings;
-import com.google.showcase.v1beta1.myCredentials;
-
-public class SyncCreateSetCredentialsProvider {
-
-  public static void main(String[] args) throws Exception {
-    syncCreateSetCredentialsProvider();
-  }
-
-  public static void syncCreateSetCredentialsProvider() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    WickedSettings wickedSettings =
-        WickedSettings.newBuilder()
-            .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
-            .build();
-    WickedClient wickedClient = WickedClient.create(wickedSettings);
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
deleted file mode 100644
index 38fb1b127b..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetCredentialsProvider1.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider1_sync]
-import com.google.showcase.v1beta1.WickedClient;
-import com.google.showcase.v1beta1.WickedSettings;
-
-public class SyncCreateSetCredentialsProvider1 {
-
-  public static void main(String[] args) throws Exception {
-    syncCreateSetCredentialsProvider1();
-  }
-
-  public static void syncCreateSetCredentialsProvider1() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    WickedSettings wickedSettings = WickedSettings.newHttpJsonBuilder().build();
-    WickedClient wickedClient = WickedClient.create(wickedSettings);
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_Create_SetCredentialsProvider1_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
deleted file mode 100644
index 87b154260c..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/create/SyncCreateSetEndpoint.java
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_Create_SetEndpoint_sync]
-import com.google.showcase.v1beta1.WickedClient;
-import com.google.showcase.v1beta1.WickedSettings;
-import com.google.showcase.v1beta1.myEndpoint;
-
-public class SyncCreateSetEndpoint {
-
-  public static void main(String[] args) throws Exception {
-    syncCreateSetEndpoint();
-  }
-
-  public static void syncCreateSetEndpoint() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    WickedSettings wickedSettings = WickedSettings.newBuilder().setEndpoint(myEndpoint).build();
-    WickedClient wickedClient = WickedClient.create(wickedSettings);
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_Create_SetEndpoint_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
deleted file mode 100644
index 0bd173c76a..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/AsyncGetLocation.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_GetLocation_async]
-import com.google.api.core.ApiFuture;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class AsyncGetLocation {
-
-  public static void main(String[] args) throws Exception {
-    asyncGetLocation();
-  }
-
-  public static void asyncGetLocation() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-      ApiFuture<Location> future = wickedClient.getLocationCallable().futureCall(request);
-      // Do something.
-      Location response = future.get();
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_GetLocation_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
deleted file mode 100644
index e5e8f160e5..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/getlocation/SyncGetLocation.java
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_GetLocation_sync]
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class SyncGetLocation {
-
-  public static void main(String[] args) throws Exception {
-    syncGetLocation();
-  }
-
-  public static void syncGetLocation() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-      Location response = wickedClient.getLocation(request);
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_GetLocation_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
deleted file mode 100644
index d37e1b1fda..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocations.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_ListLocations_async]
-import com.google.api.core.ApiFuture;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class AsyncListLocations {
-
-  public static void main(String[] args) throws Exception {
-    asyncListLocations();
-  }
-
-  public static void asyncListLocations() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<Location> future = wickedClient.listLocationsPagedCallable().futureCall(request);
-      // Do something.
-      for (Location element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_ListLocations_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
deleted file mode 100644
index f1b1ef00c1..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/AsyncListLocationsPaged.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_ListLocations_Paged_async]
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.base.Strings;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class AsyncListLocationsPaged {
-
-  public static void main(String[] args) throws Exception {
-    asyncListLocationsPaged();
-  }
-
-  public static void asyncListLocationsPaged() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        ListLocationsResponse response = wickedClient.listLocationsCallable().call(request);
-        for (Location element : response.getLocationsList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_ListLocations_Paged_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
deleted file mode 100644
index 61a487a7af..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/listlocations/SyncListLocations.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_ListLocations_sync]
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class SyncListLocations {
-
-  public static void main(String[] args) throws Exception {
-    syncListLocations();
-  }
-
-  public static void syncListLocations() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (Location element : wickedClient.listLocations(request).iterateAll()) {
-        // doThingsWith(element);
-      }
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_ListLocations_sync]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
deleted file mode 100644
index 1aa00ccb50..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wicked/persuadeevilplan/AsyncPersuadeEvilPlan.java
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_Wicked_PersuadeEvilPlan_async]
-import com.google.api.gax.rpc.ApiStreamObserver;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import com.google.showcase.v1beta1.WickedClient;
-
-public class AsyncPersuadeEvilPlan {
-
-  public static void main(String[] args) throws Exception {
-    asyncPersuadeEvilPlan();
-  }
-
-  public static void asyncPersuadeEvilPlan() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (WickedClient wickedClient = WickedClient.create()) {
-      ApiStreamObserver<EvilRequest> responseObserver =
-          new ApiStreamObserver<EvilRequest>() {
-            @Override
-            public void onNext(EvilResponse response) {
-              // Do something when a response is received.
-            }
-
-            @Override
-            public void onError(Throwable t) {
-              // Add error-handling
-            }
-
-            @Override
-            public void onCompleted() {
-              // Do something when complete.
-            }
-          };
-      ApiStreamObserver<EvilRequest> requestObserver =
-          wickedClient.persuadeEvilPlan().clientStreamingCall(responseObserver);
-      EvilRequest request =
-          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-      requestObserver.onNext(request);
-    }
-  }
-}
-// [END localhost7469_v1beta1_generated_Wicked_PersuadeEvilPlan_async]
diff --git a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java b/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
deleted file mode 100644
index af8709d91a..0000000000
--- a/showcase/gapic-showcase/samples/snippets/generated/src/main/java/com/google/showcase/v1beta1/wickedsettings/craftevilplan/SyncCraftEvilPlan.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.samples;
-
-// [START localhost7469_v1beta1_generated_WickedSettings_CraftEvilPlan_sync]
-import com.google.showcase.v1beta1.WickedSettings;
-import java.time.Duration;
-
-public class SyncCraftEvilPlan {
-
-  public static void main(String[] args) throws Exception {
-    syncCraftEvilPlan();
-  }
-
-  public static void syncCraftEvilPlan() throws Exception {
-    // This snippet has been automatically generated and should be regarded as a code template only.
-    // It will require modifications to work:
-    // - It may require correct/in-range values for request initialization.
-    // - It may require specifying regional endpoints when creating the service client as shown in
-    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    WickedSettings.Builder wickedSettingsBuilder = WickedSettings.newBuilder();
-    wickedSettingsBuilder
-        .craftEvilPlanSettings()
-        .setRetrySettings(
-            wickedSettingsBuilder
-                .craftEvilPlanSettings()
-                .getRetrySettings()
-                .toBuilder()
-                .setTotalTimeout(Duration.ofSeconds(30))
-                .build());
-    WickedSettings wickedSettings = wickedSettingsBuilder.build();
-  }
-}
-// [END localhost7469_v1beta1_generated_WickedSettings_CraftEvilPlan_sync]
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
deleted file mode 100644
index 03e7d91f3f..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsClient.java
+++ /dev/null
@@ -1,552 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import com.google.api.core.ApiFuture;
-import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.httpjson.longrunning.OperationsClient;
-import com.google.api.gax.longrunning.OperationFuture;
-import com.google.api.gax.paging.AbstractFixedSizeCollection;
-import com.google.api.gax.paging.AbstractPage;
-import com.google.api.gax.paging.AbstractPagedListResponse;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.PageContext;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.util.concurrent.MoreExecutors;
-import com.google.longrunning.Operation;
-import com.google.showcase.v1beta1.stub.CollisionsStub;
-import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
-import java.io.IOException;
-import java.util.List;
-import java.util.concurrent.TimeUnit;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Service Description: This service exercises scenarios where short names of types exhibit
- * ambiguity or collide with other types
- *
- * <p>This class provides the ability to make remote calls to the backing service through method
- * calls that map to API methods. Sample code to get started:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
- *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
- *   Location response = collisionsClient.getLocation(request);
- * }
- * }</pre>
- *
- * <p>Note: close() needs to be called on the CollisionsClient object to clean up resources such as
- * threads. In the example above, try-with-resources is used, which automatically calls close().
- *
- * <p>The surface of this class includes several types of Java methods for each of the API's
- * methods:
- *
- * <ol>
- *   <li>A "flattened" method. With this type of method, the fields of the request type have been
- *       converted into function parameters. It may be the case that not all fields are available as
- *       parameters, and not every API method will have a flattened method entry point.
- *   <li>A "request object" method. This type of method only takes one parameter, a request object,
- *       which must be constructed before the call. Not every API method will have a request object
- *       method.
- *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
- *       callable object, which can be used to initiate calls to the service.
- * </ol>
- *
- * <p>See the individual methods for example code.
- *
- * <p>Many parameters require resource names to be formatted in a particular way. To assist with
- * these names, this class includes a format method for each type of name, and additionally a parse
- * method to extract the individual identifiers contained within names that are returned.
- *
- * <p>This class can be customized by passing in a custom instance of CollisionsSettings to
- * create(). For example:
- *
- * <p>To customize credentials:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * CollisionsSettings collisionsSettings =
- *     CollisionsSettings.newBuilder()
- *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
- *         .build();
- * CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
- * }</pre>
- *
- * <p>To customize the endpoint:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * CollisionsSettings collisionsSettings =
- *     CollisionsSettings.newBuilder().setEndpoint(myEndpoint).build();
- * CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
- * }</pre>
- *
- * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
- * the wire:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * CollisionsSettings collisionsSettings = CollisionsSettings.newHttpJsonBuilder().build();
- * CollisionsClient collisionsClient = CollisionsClient.create(collisionsSettings);
- * }</pre>
- *
- * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class CollisionsClient implements BackgroundResource {
-  private final CollisionsSettings settings;
-  private final CollisionsStub stub;
-  private final OperationsClient httpJsonOperationsClient;
-  private final com.google.longrunning.OperationsClient operationsClient;
-
-  /** Constructs an instance of CollisionsClient with default settings. */
-  public static final CollisionsClient create() throws IOException {
-    return create(CollisionsSettings.newBuilder().build());
-  }
-
-  /**
-   * Constructs an instance of CollisionsClient, using the given settings. The channels are created
-   * based on the settings passed in, or defaults for any settings that are not set.
-   */
-  public static final CollisionsClient create(CollisionsSettings settings) throws IOException {
-    return new CollisionsClient(settings);
-  }
-
-  /**
-   * Constructs an instance of CollisionsClient, using the given stub for making calls. This is for
-   * advanced usage - prefer using create(CollisionsSettings).
-   */
-  public static final CollisionsClient create(CollisionsStub stub) {
-    return new CollisionsClient(stub);
-  }
-
-  /**
-   * Constructs an instance of CollisionsClient, using the given settings. This is protected so that
-   * it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
-   */
-  protected CollisionsClient(CollisionsSettings settings) throws IOException {
-    this.settings = settings;
-    this.stub = ((CollisionsStubSettings) settings.getStubSettings()).createStub();
-    this.operationsClient =
-        com.google.longrunning.OperationsClient.create(this.stub.getOperationsStub());
-    this.httpJsonOperationsClient = OperationsClient.create(this.stub.getHttpJsonOperationsStub());
-  }
-
-  protected CollisionsClient(CollisionsStub stub) {
-    this.settings = null;
-    this.stub = stub;
-    this.operationsClient =
-        com.google.longrunning.OperationsClient.create(this.stub.getOperationsStub());
-    this.httpJsonOperationsClient = OperationsClient.create(this.stub.getHttpJsonOperationsStub());
-  }
-
-  public final CollisionsSettings getSettings() {
-    return settings;
-  }
-
-  public CollisionsStub getStub() {
-    return stub;
-  }
-
-  /**
-   * Returns the OperationsClient that can be used to query the status of a long-running operation
-   * returned by another API method call.
-   */
-  public final com.google.longrunning.OperationsClient getOperationsClient() {
-    return operationsClient;
-  }
-
-  /**
-   * Returns the OperationsClient that can be used to query the status of a long-running operation
-   * returned by another API method call.
-   */
-  @BetaApi
-  public final OperationsClient getHttpJsonOperationsClient() {
-    return httpJsonOperationsClient;
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   Request request =
-   *       Request.newBuilder()
-   *           .setName("name3373707")
-   *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setLocation(Location.newBuilder().build())
-   *           .build();
-   *   Annotation response = collisionsClient.doSomethingAsync(request).get();
-   * }
-   * }</pre>
-   *
-   * @param request The request object containing all of the parameters for the API call.
-   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
-   */
-  public final OperationFuture<Annotation, com.google.showcase.v1beta1.Location> doSomethingAsync(
-      Request request) {
-    return doSomethingOperationCallable().futureCall(request);
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   Request request =
-   *       Request.newBuilder()
-   *           .setName("name3373707")
-   *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setLocation(Location.newBuilder().build())
-   *           .build();
-   *   OperationFuture<Annotation, Location> future =
-   *       collisionsClient.doSomethingOperationCallable().futureCall(request);
-   *   // Do something.
-   *   Annotation response = future.get();
-   * }
-   * }</pre>
-   */
-  public final OperationCallable<Request, Annotation, com.google.showcase.v1beta1.Location>
-      doSomethingOperationCallable() {
-    return stub.doSomethingOperationCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   Request request =
-   *       Request.newBuilder()
-   *           .setName("name3373707")
-   *           .setAnnotation(Annotation.newBuilder().build())
-   *           .setLocation(Location.newBuilder().build())
-   *           .build();
-   *   ApiFuture<Operation> future = collisionsClient.doSomethingCallable().futureCall(request);
-   *   // Do something.
-   *   Operation response = future.get();
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<Request, Operation> doSomethingCallable() {
-    return stub.doSomethingCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Lists information about the supported locations for this service.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   ListLocationsRequest request =
-   *       ListLocationsRequest.newBuilder()
-   *           .setName("name3373707")
-   *           .setFilter("filter-1274492040")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (Location element : collisionsClient.listLocations(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
-   * }
-   * }</pre>
-   *
-   * @param request The request object containing all of the parameters for the API call.
-   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
-   */
-  public final ListLocationsPagedResponse listLocations(ListLocationsRequest request) {
-    return listLocationsPagedCallable().call(request);
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Lists information about the supported locations for this service.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   ListLocationsRequest request =
-   *       ListLocationsRequest.newBuilder()
-   *           .setName("name3373707")
-   *           .setFilter("filter-1274492040")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<Location> future =
-   *       collisionsClient.listLocationsPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (Location element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    return stub.listLocationsPagedCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Lists information about the supported locations for this service.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   ListLocationsRequest request =
-   *       ListLocationsRequest.newBuilder()
-   *           .setName("name3373707")
-   *           .setFilter("filter-1274492040")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     ListLocationsResponse response = collisionsClient.listLocationsCallable().call(request);
-   *     for (Location element : response.getLocationsList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
-   *   }
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    return stub.listLocationsCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Gets information about a location.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-   *   Location response = collisionsClient.getLocation(request);
-   * }
-   * }</pre>
-   *
-   * @param request The request object containing all of the parameters for the API call.
-   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
-   */
-  public final Location getLocation(GetLocationRequest request) {
-    return getLocationCallable().call(request);
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Gets information about a location.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
-   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-   *   ApiFuture<Location> future = collisionsClient.getLocationCallable().futureCall(request);
-   *   // Do something.
-   *   Location response = future.get();
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
-    return stub.getLocationCallable();
-  }
-
-  @Override
-  public final void close() {
-    stub.close();
-  }
-
-  @Override
-  public void shutdown() {
-    stub.shutdown();
-  }
-
-  @Override
-  public boolean isShutdown() {
-    return stub.isShutdown();
-  }
-
-  @Override
-  public boolean isTerminated() {
-    return stub.isTerminated();
-  }
-
-  @Override
-  public void shutdownNow() {
-    stub.shutdownNow();
-  }
-
-  @Override
-  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
-    return stub.awaitTermination(duration, unit);
-  }
-
-  public static class ListLocationsPagedResponse
-      extends AbstractPagedListResponse<
-          ListLocationsRequest,
-          ListLocationsResponse,
-          Location,
-          ListLocationsPage,
-          ListLocationsFixedSizeCollection> {
-
-    public static ApiFuture<ListLocationsPagedResponse> createAsync(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ApiFuture<ListLocationsResponse> futureResponse) {
-      ApiFuture<ListLocationsPage> futurePage =
-          ListLocationsPage.createEmptyPage().createPageAsync(context, futureResponse);
-      return ApiFutures.transform(
-          futurePage,
-          input -> new ListLocationsPagedResponse(input),
-          MoreExecutors.directExecutor());
-    }
-
-    private ListLocationsPagedResponse(ListLocationsPage page) {
-      super(page, ListLocationsFixedSizeCollection.createEmptyCollection());
-    }
-  }
-
-  public static class ListLocationsPage
-      extends AbstractPage<
-          ListLocationsRequest, ListLocationsResponse, Location, ListLocationsPage> {
-
-    private ListLocationsPage(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ListLocationsResponse response) {
-      super(context, response);
-    }
-
-    private static ListLocationsPage createEmptyPage() {
-      return new ListLocationsPage(null, null);
-    }
-
-    @Override
-    protected ListLocationsPage createPage(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ListLocationsResponse response) {
-      return new ListLocationsPage(context, response);
-    }
-
-    @Override
-    public ApiFuture<ListLocationsPage> createPageAsync(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ApiFuture<ListLocationsResponse> futureResponse) {
-      return super.createPageAsync(context, futureResponse);
-    }
-  }
-
-  public static class ListLocationsFixedSizeCollection
-      extends AbstractFixedSizeCollection<
-          ListLocationsRequest,
-          ListLocationsResponse,
-          Location,
-          ListLocationsPage,
-          ListLocationsFixedSizeCollection> {
-
-    private ListLocationsFixedSizeCollection(List<ListLocationsPage> pages, int collectionSize) {
-      super(pages, collectionSize);
-    }
-
-    private static ListLocationsFixedSizeCollection createEmptyCollection() {
-      return new ListLocationsFixedSizeCollection(null, 0);
-    }
-
-    @Override
-    protected ListLocationsFixedSizeCollection createCollection(
-        List<ListLocationsPage> pages, int collectionSize) {
-      return new ListLocationsFixedSizeCollection(pages, collectionSize);
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
deleted file mode 100644
index 87f40b9349..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/CollisionsSettings.java
+++ /dev/null
@@ -1,249 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.core.ApiFunction;
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.GoogleCredentialsProvider;
-import com.google.api.gax.core.InstantiatingExecutorProvider;
-import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
-import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.ClientSettings;
-import com.google.api.gax.rpc.OperationCallSettings;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.StubSettings;
-import com.google.api.gax.rpc.TransportChannelProvider;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.longrunning.Operation;
-import com.google.showcase.v1beta1.stub.CollisionsStubSettings;
-import java.io.IOException;
-import java.util.List;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Settings class to configure an instance of {@link CollisionsClient}.
- *
- * <p>The default instance has everything set to sensible defaults:
- *
- * <ul>
- *   <li>The default service address (localhost) and default port (7469) are used.
- *   <li>Credentials are acquired automatically through Application Default Credentials.
- *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
- * </ul>
- *
- * <p>The builder of this class is recursive, so contained classes are themselves builders. When
- * build() is called, the tree of builders is called to create the complete settings object.
- *
- * <p>For example, to set the total timeout of getLocation to 30 seconds:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * CollisionsSettings.Builder collisionsSettingsBuilder = CollisionsSettings.newBuilder();
- * collisionsSettingsBuilder
- *     .getLocationSettings()
- *     .setRetrySettings(
- *         collisionsSettingsBuilder
- *             .getLocationSettings()
- *             .getRetrySettings()
- *             .toBuilder()
- *             .setTotalTimeout(Duration.ofSeconds(30))
- *             .build());
- * CollisionsSettings collisionsSettings = collisionsSettingsBuilder.build();
- * }</pre>
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class CollisionsSettings extends ClientSettings<CollisionsSettings> {
-
-  /** Returns the object with the settings used for calls to doSomething. */
-  public UnaryCallSettings<Request, Operation> doSomethingSettings() {
-    return ((CollisionsStubSettings) getStubSettings()).doSomethingSettings();
-  }
-
-  /** Returns the object with the settings used for calls to doSomething. */
-  public OperationCallSettings<Request, Annotation, com.google.showcase.v1beta1.Location>
-      doSomethingOperationSettings() {
-    return ((CollisionsStubSettings) getStubSettings()).doSomethingOperationSettings();
-  }
-
-  /** Returns the object with the settings used for calls to listLocations. */
-  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      listLocationsSettings() {
-    return ((CollisionsStubSettings) getStubSettings()).listLocationsSettings();
-  }
-
-  /** Returns the object with the settings used for calls to getLocation. */
-  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
-    return ((CollisionsStubSettings) getStubSettings()).getLocationSettings();
-  }
-
-  public static final CollisionsSettings create(CollisionsStubSettings stub) throws IOException {
-    return new CollisionsSettings.Builder(stub.toBuilder()).build();
-  }
-
-  /** Returns a builder for the default ExecutorProvider for this service. */
-  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
-    return CollisionsStubSettings.defaultExecutorProviderBuilder();
-  }
-
-  /** Returns the default service endpoint. */
-  public static String getDefaultEndpoint() {
-    return CollisionsStubSettings.getDefaultEndpoint();
-  }
-
-  /** Returns the default service scopes. */
-  public static List<String> getDefaultServiceScopes() {
-    return CollisionsStubSettings.getDefaultServiceScopes();
-  }
-
-  /** Returns a builder for the default credentials for this service. */
-  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
-    return CollisionsStubSettings.defaultCredentialsProviderBuilder();
-  }
-
-  /** Returns a builder for the default gRPC ChannelProvider for this service. */
-  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
-    return CollisionsStubSettings.defaultGrpcTransportProviderBuilder();
-  }
-
-  /** Returns a builder for the default REST ChannelProvider for this service. */
-  @BetaApi
-  public static InstantiatingHttpJsonChannelProvider.Builder
-      defaultHttpJsonTransportProviderBuilder() {
-    return CollisionsStubSettings.defaultHttpJsonTransportProviderBuilder();
-  }
-
-  public static TransportChannelProvider defaultTransportChannelProvider() {
-    return CollisionsStubSettings.defaultTransportChannelProvider();
-  }
-
-  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
-    return CollisionsStubSettings.defaultApiClientHeaderProviderBuilder();
-  }
-
-  /** Returns a new gRPC builder for this class. */
-  public static Builder newBuilder() {
-    return Builder.createDefault();
-  }
-
-  /** Returns a new REST builder for this class. */
-  @BetaApi
-  public static Builder newHttpJsonBuilder() {
-    return Builder.createHttpJsonDefault();
-  }
-
-  /** Returns a new builder for this class. */
-  public static Builder newBuilder(ClientContext clientContext) {
-    return new Builder(clientContext);
-  }
-
-  /** Returns a builder containing all the values of this settings class. */
-  public Builder toBuilder() {
-    return new Builder(this);
-  }
-
-  protected CollisionsSettings(Builder settingsBuilder) throws IOException {
-    super(settingsBuilder);
-  }
-
-  /** Builder for CollisionsSettings. */
-  public static class Builder extends ClientSettings.Builder<CollisionsSettings, Builder> {
-
-    protected Builder() throws IOException {
-      this(((ClientContext) null));
-    }
-
-    protected Builder(ClientContext clientContext) {
-      super(CollisionsStubSettings.newBuilder(clientContext));
-    }
-
-    protected Builder(CollisionsSettings settings) {
-      super(settings.getStubSettings().toBuilder());
-    }
-
-    protected Builder(CollisionsStubSettings.Builder stubSettings) {
-      super(stubSettings);
-    }
-
-    private static Builder createDefault() {
-      return new Builder(CollisionsStubSettings.newBuilder());
-    }
-
-    @BetaApi
-    private static Builder createHttpJsonDefault() {
-      return new Builder(CollisionsStubSettings.newHttpJsonBuilder());
-    }
-
-    public CollisionsStubSettings.Builder getStubSettingsBuilder() {
-      return ((CollisionsStubSettings.Builder) getStubSettings());
-    }
-
-    /**
-     * Applies the given settings updater function to all of the unary API methods in this service.
-     *
-     * <p>Note: This method does not support applying settings to streaming methods.
-     */
-    public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
-      super.applyToAllUnaryMethods(
-          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
-      return this;
-    }
-
-    /** Returns the builder for the settings used for calls to doSomething. */
-    public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
-      return getStubSettingsBuilder().doSomethingSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to doSomething. */
-    public OperationCallSettings.Builder<Request, Annotation, com.google.showcase.v1beta1.Location>
-        doSomethingOperationSettings() {
-      return getStubSettingsBuilder().doSomethingOperationSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to listLocations. */
-    public PagedCallSettings.Builder<
-            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-        listLocationsSettings() {
-      return getStubSettingsBuilder().listLocationsSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to getLocation. */
-    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
-      return getStubSettingsBuilder().getLocationSettings();
-    }
-
-    @Override
-    public CollisionsSettings build() throws IOException {
-      return new CollisionsSettings(this);
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
deleted file mode 100644
index 014d399e74..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedClient.java
+++ /dev/null
@@ -1,554 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import com.google.api.core.ApiFuture;
-import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.paging.AbstractFixedSizeCollection;
-import com.google.api.gax.paging.AbstractPage;
-import com.google.api.gax.paging.AbstractPagedListResponse;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.PageContext;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.util.concurrent.MoreExecutors;
-import com.google.showcase.v1beta1.stub.WickedStub;
-import com.google.showcase.v1beta1.stub.WickedStubSettings;
-import java.io.IOException;
-import java.util.List;
-import java.util.concurrent.TimeUnit;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Service Description: This service is used to show a Service with either non-enabled or
- * non-eligible RPCs for HttpJson (Http 1.1). Non-Enabled: Missing the (google.api.http) annotation
- * to enabled it Non-Eligible: BIDI and Client side streaming are not supported with Http 1.1
- * Service name is reference to `No REST for the Wicked`
- *
- * <p>This class provides the ability to make remote calls to the backing service through method
- * calls that map to API methods. Sample code to get started:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (WickedClient wickedClient = WickedClient.create()) {
- *   EvilRequest request =
- *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
- *   EvilResponse response = wickedClient.craftEvilPlan(request);
- * }
- * }</pre>
- *
- * <p>Note: close() needs to be called on the WickedClient object to clean up resources such as
- * threads. In the example above, try-with-resources is used, which automatically calls close().
- *
- * <p>The surface of this class includes several types of Java methods for each of the API's
- * methods:
- *
- * <ol>
- *   <li>A "flattened" method. With this type of method, the fields of the request type have been
- *       converted into function parameters. It may be the case that not all fields are available as
- *       parameters, and not every API method will have a flattened method entry point.
- *   <li>A "request object" method. This type of method only takes one parameter, a request object,
- *       which must be constructed before the call. Not every API method will have a request object
- *       method.
- *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
- *       callable object, which can be used to initiate calls to the service.
- * </ol>
- *
- * <p>See the individual methods for example code.
- *
- * <p>Many parameters require resource names to be formatted in a particular way. To assist with
- * these names, this class includes a format method for each type of name, and additionally a parse
- * method to extract the individual identifiers contained within names that are returned.
- *
- * <p>This class can be customized by passing in a custom instance of WickedSettings to create().
- * For example:
- *
- * <p>To customize credentials:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * WickedSettings wickedSettings =
- *     WickedSettings.newBuilder()
- *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
- *         .build();
- * WickedClient wickedClient = WickedClient.create(wickedSettings);
- * }</pre>
- *
- * <p>To customize the endpoint:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * WickedSettings wickedSettings = WickedSettings.newBuilder().setEndpoint(myEndpoint).build();
- * WickedClient wickedClient = WickedClient.create(wickedSettings);
- * }</pre>
- *
- * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
- * the wire:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * WickedSettings wickedSettings = WickedSettings.newHttpJsonBuilder().build();
- * WickedClient wickedClient = WickedClient.create(wickedSettings);
- * }</pre>
- *
- * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class WickedClient implements BackgroundResource {
-  private final WickedSettings settings;
-  private final WickedStub stub;
-
-  /** Constructs an instance of WickedClient with default settings. */
-  public static final WickedClient create() throws IOException {
-    return create(WickedSettings.newBuilder().build());
-  }
-
-  /**
-   * Constructs an instance of WickedClient, using the given settings. The channels are created
-   * based on the settings passed in, or defaults for any settings that are not set.
-   */
-  public static final WickedClient create(WickedSettings settings) throws IOException {
-    return new WickedClient(settings);
-  }
-
-  /**
-   * Constructs an instance of WickedClient, using the given stub for making calls. This is for
-   * advanced usage - prefer using create(WickedSettings).
-   */
-  public static final WickedClient create(WickedStub stub) {
-    return new WickedClient(stub);
-  }
-
-  /**
-   * Constructs an instance of WickedClient, using the given settings. This is protected so that it
-   * is easy to make a subclass, but otherwise, the static factory methods should be preferred.
-   */
-  protected WickedClient(WickedSettings settings) throws IOException {
-    this.settings = settings;
-    this.stub = ((WickedStubSettings) settings.getStubSettings()).createStub();
-  }
-
-  protected WickedClient(WickedStub stub) {
-    this.settings = null;
-    this.stub = stub;
-  }
-
-  public final WickedSettings getSettings() {
-    return settings;
-  }
-
-  public WickedStub getStub() {
-    return stub;
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   EvilResponse response = wickedClient.craftEvilPlan(request);
-   * }
-   * }</pre>
-   *
-   * @param request The request object containing all of the parameters for the API call.
-   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
-   */
-  public final EvilResponse craftEvilPlan(EvilRequest request) {
-    return craftEvilPlanCallable().call(request);
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   ApiFuture<EvilResponse> future = wickedClient.craftEvilPlanCallable().futureCall(request);
-   *   // Do something.
-   *   EvilResponse response = future.get();
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
-    return stub.craftEvilPlanCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   BidiStream<EvilRequest, EvilResponse> bidiStream =
-   *       wickedClient.brainstormEvilPlansCallable().call();
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   bidiStream.send(request);
-   *   for (EvilResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
-   * }
-   * }</pre>
-   */
-  public final BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
-    return stub.brainstormEvilPlansCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   ApiStreamObserver<EvilRequest> responseObserver =
-   *       new ApiStreamObserver<EvilRequest>() {
-   *         {@literal @}Override
-   *         public void onNext(EvilResponse response) {
-   *           // Do something when a response is received.
-   *         }
-   *
-   *         {@literal @}Override
-   *         public void onError(Throwable t) {
-   *           // Add error-handling
-   *         }
-   *
-   *         {@literal @}Override
-   *         public void onCompleted() {
-   *           // Do something when complete.
-   *         }
-   *       };
-   *   ApiStreamObserver<EvilRequest> requestObserver =
-   *       wickedClient.persuadeEvilPlan().clientStreamingCall(responseObserver);
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   requestObserver.onNext(request);
-   * }
-   * }</pre>
-   */
-  public final ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
-    return stub.persuadeEvilPlanCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Lists information about the supported locations for this service.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   ListLocationsRequest request =
-   *       ListLocationsRequest.newBuilder()
-   *           .setName("name3373707")
-   *           .setFilter("filter-1274492040")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (Location element : wickedClient.listLocations(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
-   * }
-   * }</pre>
-   *
-   * @param request The request object containing all of the parameters for the API call.
-   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
-   */
-  public final ListLocationsPagedResponse listLocations(ListLocationsRequest request) {
-    return listLocationsPagedCallable().call(request);
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Lists information about the supported locations for this service.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   ListLocationsRequest request =
-   *       ListLocationsRequest.newBuilder()
-   *           .setName("name3373707")
-   *           .setFilter("filter-1274492040")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<Location> future = wickedClient.listLocationsPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (Location element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    return stub.listLocationsPagedCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Lists information about the supported locations for this service.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   ListLocationsRequest request =
-   *       ListLocationsRequest.newBuilder()
-   *           .setName("name3373707")
-   *           .setFilter("filter-1274492040")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     ListLocationsResponse response = wickedClient.listLocationsCallable().call(request);
-   *     for (Location element : response.getLocationsList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
-   *   }
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    return stub.listLocationsCallable();
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Gets information about a location.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-   *   Location response = wickedClient.getLocation(request);
-   * }
-   * }</pre>
-   *
-   * @param request The request object containing all of the parameters for the API call.
-   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
-   */
-  public final Location getLocation(GetLocationRequest request) {
-    return getLocationCallable().call(request);
-  }
-
-  // AUTO-GENERATED DOCUMENTATION AND METHOD.
-  /**
-   * Gets information about a location.
-   *
-   * <p>Sample code:
-   *
-   * <pre>{@code
-   * // This snippet has been automatically generated and should be regarded as a code template only.
-   * // It will require modifications to work:
-   * // - It may require correct/in-range values for request initialization.
-   * // - It may require specifying regional endpoints when creating the service client as shown in
-   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-   *   ApiFuture<Location> future = wickedClient.getLocationCallable().futureCall(request);
-   *   // Do something.
-   *   Location response = future.get();
-   * }
-   * }</pre>
-   */
-  public final UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
-    return stub.getLocationCallable();
-  }
-
-  @Override
-  public final void close() {
-    stub.close();
-  }
-
-  @Override
-  public void shutdown() {
-    stub.shutdown();
-  }
-
-  @Override
-  public boolean isShutdown() {
-    return stub.isShutdown();
-  }
-
-  @Override
-  public boolean isTerminated() {
-    return stub.isTerminated();
-  }
-
-  @Override
-  public void shutdownNow() {
-    stub.shutdownNow();
-  }
-
-  @Override
-  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
-    return stub.awaitTermination(duration, unit);
-  }
-
-  public static class ListLocationsPagedResponse
-      extends AbstractPagedListResponse<
-          ListLocationsRequest,
-          ListLocationsResponse,
-          Location,
-          ListLocationsPage,
-          ListLocationsFixedSizeCollection> {
-
-    public static ApiFuture<ListLocationsPagedResponse> createAsync(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ApiFuture<ListLocationsResponse> futureResponse) {
-      ApiFuture<ListLocationsPage> futurePage =
-          ListLocationsPage.createEmptyPage().createPageAsync(context, futureResponse);
-      return ApiFutures.transform(
-          futurePage,
-          input -> new ListLocationsPagedResponse(input),
-          MoreExecutors.directExecutor());
-    }
-
-    private ListLocationsPagedResponse(ListLocationsPage page) {
-      super(page, ListLocationsFixedSizeCollection.createEmptyCollection());
-    }
-  }
-
-  public static class ListLocationsPage
-      extends AbstractPage<
-          ListLocationsRequest, ListLocationsResponse, Location, ListLocationsPage> {
-
-    private ListLocationsPage(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ListLocationsResponse response) {
-      super(context, response);
-    }
-
-    private static ListLocationsPage createEmptyPage() {
-      return new ListLocationsPage(null, null);
-    }
-
-    @Override
-    protected ListLocationsPage createPage(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ListLocationsResponse response) {
-      return new ListLocationsPage(context, response);
-    }
-
-    @Override
-    public ApiFuture<ListLocationsPage> createPageAsync(
-        PageContext<ListLocationsRequest, ListLocationsResponse, Location> context,
-        ApiFuture<ListLocationsResponse> futureResponse) {
-      return super.createPageAsync(context, futureResponse);
-    }
-  }
-
-  public static class ListLocationsFixedSizeCollection
-      extends AbstractFixedSizeCollection<
-          ListLocationsRequest,
-          ListLocationsResponse,
-          Location,
-          ListLocationsPage,
-          ListLocationsFixedSizeCollection> {
-
-    private ListLocationsFixedSizeCollection(List<ListLocationsPage> pages, int collectionSize) {
-      super(pages, collectionSize);
-    }
-
-    private static ListLocationsFixedSizeCollection createEmptyCollection() {
-      return new ListLocationsFixedSizeCollection(null, 0);
-    }
-
-    @Override
-    protected ListLocationsFixedSizeCollection createCollection(
-        List<ListLocationsPage> pages, int collectionSize) {
-      return new ListLocationsFixedSizeCollection(pages, collectionSize);
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
deleted file mode 100644
index c3a824a6b2..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/WickedSettings.java
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.core.ApiFunction;
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.GoogleCredentialsProvider;
-import com.google.api.gax.core.InstantiatingExecutorProvider;
-import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
-import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.ClientSettings;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.StreamingCallSettings;
-import com.google.api.gax.rpc.StubSettings;
-import com.google.api.gax.rpc.TransportChannelProvider;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.stub.WickedStubSettings;
-import java.io.IOException;
-import java.util.List;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Settings class to configure an instance of {@link WickedClient}.
- *
- * <p>The default instance has everything set to sensible defaults:
- *
- * <ul>
- *   <li>The default service address (localhost) and default port (7469) are used.
- *   <li>Credentials are acquired automatically through Application Default Credentials.
- *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
- * </ul>
- *
- * <p>The builder of this class is recursive, so contained classes are themselves builders. When
- * build() is called, the tree of builders is called to create the complete settings object.
- *
- * <p>For example, to set the total timeout of craftEvilPlan to 30 seconds:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * WickedSettings.Builder wickedSettingsBuilder = WickedSettings.newBuilder();
- * wickedSettingsBuilder
- *     .craftEvilPlanSettings()
- *     .setRetrySettings(
- *         wickedSettingsBuilder
- *             .craftEvilPlanSettings()
- *             .getRetrySettings()
- *             .toBuilder()
- *             .setTotalTimeout(Duration.ofSeconds(30))
- *             .build());
- * WickedSettings wickedSettings = wickedSettingsBuilder.build();
- * }</pre>
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class WickedSettings extends ClientSettings<WickedSettings> {
-
-  /** Returns the object with the settings used for calls to craftEvilPlan. */
-  public UnaryCallSettings<EvilRequest, EvilResponse> craftEvilPlanSettings() {
-    return ((WickedStubSettings) getStubSettings()).craftEvilPlanSettings();
-  }
-
-  /** Returns the object with the settings used for calls to brainstormEvilPlans. */
-  public StreamingCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
-    return ((WickedStubSettings) getStubSettings()).brainstormEvilPlansSettings();
-  }
-
-  /** Returns the object with the settings used for calls to persuadeEvilPlan. */
-  public StreamingCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
-    return ((WickedStubSettings) getStubSettings()).persuadeEvilPlanSettings();
-  }
-
-  /** Returns the object with the settings used for calls to listLocations. */
-  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      listLocationsSettings() {
-    return ((WickedStubSettings) getStubSettings()).listLocationsSettings();
-  }
-
-  /** Returns the object with the settings used for calls to getLocation. */
-  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
-    return ((WickedStubSettings) getStubSettings()).getLocationSettings();
-  }
-
-  public static final WickedSettings create(WickedStubSettings stub) throws IOException {
-    return new WickedSettings.Builder(stub.toBuilder()).build();
-  }
-
-  /** Returns a builder for the default ExecutorProvider for this service. */
-  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
-    return WickedStubSettings.defaultExecutorProviderBuilder();
-  }
-
-  /** Returns the default service endpoint. */
-  public static String getDefaultEndpoint() {
-    return WickedStubSettings.getDefaultEndpoint();
-  }
-
-  /** Returns the default service scopes. */
-  public static List<String> getDefaultServiceScopes() {
-    return WickedStubSettings.getDefaultServiceScopes();
-  }
-
-  /** Returns a builder for the default credentials for this service. */
-  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
-    return WickedStubSettings.defaultCredentialsProviderBuilder();
-  }
-
-  /** Returns a builder for the default gRPC ChannelProvider for this service. */
-  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
-    return WickedStubSettings.defaultGrpcTransportProviderBuilder();
-  }
-
-  /** Returns a builder for the default REST ChannelProvider for this service. */
-  @BetaApi
-  public static InstantiatingHttpJsonChannelProvider.Builder
-      defaultHttpJsonTransportProviderBuilder() {
-    return WickedStubSettings.defaultHttpJsonTransportProviderBuilder();
-  }
-
-  public static TransportChannelProvider defaultTransportChannelProvider() {
-    return WickedStubSettings.defaultTransportChannelProvider();
-  }
-
-  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
-    return WickedStubSettings.defaultApiClientHeaderProviderBuilder();
-  }
-
-  /** Returns a new gRPC builder for this class. */
-  public static Builder newBuilder() {
-    return Builder.createDefault();
-  }
-
-  /** Returns a new REST builder for this class. */
-  @BetaApi
-  public static Builder newHttpJsonBuilder() {
-    return Builder.createHttpJsonDefault();
-  }
-
-  /** Returns a new builder for this class. */
-  public static Builder newBuilder(ClientContext clientContext) {
-    return new Builder(clientContext);
-  }
-
-  /** Returns a builder containing all the values of this settings class. */
-  public Builder toBuilder() {
-    return new Builder(this);
-  }
-
-  protected WickedSettings(Builder settingsBuilder) throws IOException {
-    super(settingsBuilder);
-  }
-
-  /** Builder for WickedSettings. */
-  public static class Builder extends ClientSettings.Builder<WickedSettings, Builder> {
-
-    protected Builder() throws IOException {
-      this(((ClientContext) null));
-    }
-
-    protected Builder(ClientContext clientContext) {
-      super(WickedStubSettings.newBuilder(clientContext));
-    }
-
-    protected Builder(WickedSettings settings) {
-      super(settings.getStubSettings().toBuilder());
-    }
-
-    protected Builder(WickedStubSettings.Builder stubSettings) {
-      super(stubSettings);
-    }
-
-    private static Builder createDefault() {
-      return new Builder(WickedStubSettings.newBuilder());
-    }
-
-    @BetaApi
-    private static Builder createHttpJsonDefault() {
-      return new Builder(WickedStubSettings.newHttpJsonBuilder());
-    }
-
-    public WickedStubSettings.Builder getStubSettingsBuilder() {
-      return ((WickedStubSettings.Builder) getStubSettings());
-    }
-
-    /**
-     * Applies the given settings updater function to all of the unary API methods in this service.
-     *
-     * <p>Note: This method does not support applying settings to streaming methods.
-     */
-    public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
-      super.applyToAllUnaryMethods(
-          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
-      return this;
-    }
-
-    /** Returns the builder for the settings used for calls to craftEvilPlan. */
-    public UnaryCallSettings.Builder<EvilRequest, EvilResponse> craftEvilPlanSettings() {
-      return getStubSettingsBuilder().craftEvilPlanSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to brainstormEvilPlans. */
-    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
-      return getStubSettingsBuilder().brainstormEvilPlansSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to persuadeEvilPlan. */
-    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
-      return getStubSettingsBuilder().persuadeEvilPlanSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to listLocations. */
-    public PagedCallSettings.Builder<
-            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-        listLocationsSettings() {
-      return getStubSettingsBuilder().listLocationsSettings();
-    }
-
-    /** Returns the builder for the settings used for calls to getLocation. */
-    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
-      return getStubSettingsBuilder().getLocationSettings();
-    }
-
-    @Override
-    public WickedSettings build() throws IOException {
-      return new WickedSettings(this);
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json
index ec839e018f..b79bfb905f 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/gapic_metadata.json
@@ -250,48 +250,6 @@
           }
         }
       }
-    },
-    "Collisions": {
-      "clients": {
-        "grpc": {
-          "libraryClient": "CollisionsClient",
-          "rpcs": {
-            "GetLocation": {
-              "methods": ["getLocation", "getLocationCallable"]
-            },
-            "ListLocations": {
-              "methods": ["listLocations", "listLocationsPagedCallable", "listLocationsCallable"]
-            },
-            "doSomething": {
-              "methods": ["doSomethingAsync", "doSomethingOperationCallable", "doSomethingCallable"]
-            }
-          }
-        }
-      }
-    },
-    "Wicked": {
-      "clients": {
-        "grpc": {
-          "libraryClient": "WickedClient",
-          "rpcs": {
-            "BrainstormEvilPlans": {
-              "methods": ["brainstormEvilPlansCallable"]
-            },
-            "CraftEvilPlan": {
-              "methods": ["craftEvilPlan", "craftEvilPlanCallable"]
-            },
-            "GetLocation": {
-              "methods": ["getLocation", "getLocationCallable"]
-            },
-            "ListLocations": {
-              "methods": ["listLocations", "listLocationsPagedCallable", "listLocationsCallable"]
-            },
-            "PersuadeEvilPlan": {
-              "methods": ["persuadeEvilPlanCallable"]
-            }
-          }
-        }
-      }
     }
   }
 }
\ No newline at end of file
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
index 9f49d78924..3e4b18d27e 100644
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
+++ b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/package-info.java
@@ -155,47 +155,6 @@
  *   Session response = testingClient.createSession(request);
  * }
  * }</pre>
- *
- * <p>======================= CollisionsClient =======================
- *
- * <p>Service Description: This service exercises scenarios where short names of types exhibit
- * ambiguity or collide with other types
- *
- * <p>Sample for CollisionsClient:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (CollisionsClient collisionsClient = CollisionsClient.create()) {
- *   GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
- *   Location response = collisionsClient.getLocation(request);
- * }
- * }</pre>
- *
- * <p>======================= WickedClient =======================
- *
- * <p>Service Description: This service is used to show a Service with either non-enabled or
- * non-eligible RPCs for HttpJson (Http 1.1). Non-Enabled: Missing the (google.api.http) annotation
- * to enabled it Non-Eligible: BIDI and Client side streaming are not supported with Http 1.1
- * Service name is reference to `No REST for the Wicked`
- *
- * <p>Sample for WickedClient:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (WickedClient wickedClient = WickedClient.create()) {
- *   EvilRequest request =
- *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
- *   EvilResponse response = wickedClient.craftEvilPlan(request);
- * }
- * }</pre>
  */
 @Generated("by gapic-generator-java")
 package com.google.showcase.v1beta1;
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
deleted file mode 100644
index 0812b07fe1..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStub.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.longrunning.Operation;
-import com.google.longrunning.stub.OperationsStub;
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Location;
-import com.google.showcase.v1beta1.Request;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Base stub class for the Collisions service API.
- *
- * <p>This class is for advanced usage and reflects the underlying API directly.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public abstract class CollisionsStub implements BackgroundResource {
-
-  public OperationsStub getOperationsStub() {
-    return null;
-  }
-
-  public com.google.api.gax.httpjson.longrunning.stub.OperationsStub getHttpJsonOperationsStub() {
-    return null;
-  }
-
-  public OperationCallable<Request, Annotation, Location> doSomethingOperationCallable() {
-    throw new UnsupportedOperationException("Not implemented: doSomethingOperationCallable()");
-  }
-
-  public UnaryCallable<Request, Operation> doSomethingCallable() {
-    throw new UnsupportedOperationException("Not implemented: doSomethingCallable()");
-  }
-
-  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    throw new UnsupportedOperationException("Not implemented: listLocationsPagedCallable()");
-  }
-
-  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    throw new UnsupportedOperationException("Not implemented: listLocationsCallable()");
-  }
-
-  public UnaryCallable<GetLocationRequest, com.google.cloud.location.Location>
-      getLocationCallable() {
-    throw new UnsupportedOperationException("Not implemented: getLocationCallable()");
-  }
-
-  @Override
-  public abstract void close();
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
deleted file mode 100644
index 9da36484d5..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/CollisionsStubSettings.java
+++ /dev/null
@@ -1,487 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.core.ApiFunction;
-import com.google.api.core.ApiFuture;
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.GaxProperties;
-import com.google.api.gax.core.GoogleCredentialsProvider;
-import com.google.api.gax.core.InstantiatingExecutorProvider;
-import com.google.api.gax.grpc.GaxGrpcProperties;
-import com.google.api.gax.grpc.GrpcTransportChannel;
-import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
-import com.google.api.gax.grpc.ProtoOperationTransformers;
-import com.google.api.gax.httpjson.GaxHttpJsonProperties;
-import com.google.api.gax.httpjson.HttpJsonTransportChannel;
-import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
-import com.google.api.gax.longrunning.OperationSnapshot;
-import com.google.api.gax.longrunning.OperationTimedPollAlgorithm;
-import com.google.api.gax.retrying.RetrySettings;
-import com.google.api.gax.rpc.ApiCallContext;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.OperationCallSettings;
-import com.google.api.gax.rpc.PageContext;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.PagedListDescriptor;
-import com.google.api.gax.rpc.PagedListResponseFactory;
-import com.google.api.gax.rpc.StatusCode;
-import com.google.api.gax.rpc.StubSettings;
-import com.google.api.gax.rpc.TransportChannelProvider;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Lists;
-import com.google.longrunning.Operation;
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Location;
-import com.google.showcase.v1beta1.Request;
-import java.io.IOException;
-import java.util.List;
-import javax.annotation.Generated;
-import org.threeten.bp.Duration;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Settings class to configure an instance of {@link CollisionsStub}.
- *
- * <p>The default instance has everything set to sensible defaults:
- *
- * <ul>
- *   <li>The default service address (localhost) and default port (7469) are used.
- *   <li>Credentials are acquired automatically through Application Default Credentials.
- *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
- * </ul>
- *
- * <p>The builder of this class is recursive, so contained classes are themselves builders. When
- * build() is called, the tree of builders is called to create the complete settings object.
- *
- * <p>For example, to set the total timeout of getLocation to 30 seconds:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * CollisionsStubSettings.Builder collisionsSettingsBuilder = CollisionsStubSettings.newBuilder();
- * collisionsSettingsBuilder
- *     .getLocationSettings()
- *     .setRetrySettings(
- *         collisionsSettingsBuilder
- *             .getLocationSettings()
- *             .getRetrySettings()
- *             .toBuilder()
- *             .setTotalTimeout(Duration.ofSeconds(30))
- *             .build());
- * CollisionsStubSettings collisionsSettings = collisionsSettingsBuilder.build();
- * }</pre>
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class CollisionsStubSettings extends StubSettings<CollisionsStubSettings> {
-  /** The default scopes of the service. */
-  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
-      ImmutableList.<String>builder().build();
-
-  private final UnaryCallSettings<Request, Operation> doSomethingSettings;
-  private final OperationCallSettings<Request, Annotation, Location> doSomethingOperationSettings;
-  private final PagedCallSettings<
-          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      listLocationsSettings;
-  private final UnaryCallSettings<GetLocationRequest, com.google.cloud.location.Location>
-      getLocationSettings;
-
-  private static final PagedListDescriptor<
-          ListLocationsRequest, ListLocationsResponse, com.google.cloud.location.Location>
-      LIST_LOCATIONS_PAGE_STR_DESC =
-          new PagedListDescriptor<
-              ListLocationsRequest, ListLocationsResponse, com.google.cloud.location.Location>() {
-            @Override
-            public String emptyToken() {
-              return "";
-            }
-
-            @Override
-            public ListLocationsRequest injectToken(ListLocationsRequest payload, String token) {
-              return ListLocationsRequest.newBuilder(payload).setPageToken(token).build();
-            }
-
-            @Override
-            public ListLocationsRequest injectPageSize(ListLocationsRequest payload, int pageSize) {
-              return ListLocationsRequest.newBuilder(payload).setPageSize(pageSize).build();
-            }
-
-            @Override
-            public Integer extractPageSize(ListLocationsRequest payload) {
-              return payload.getPageSize();
-            }
-
-            @Override
-            public String extractNextToken(ListLocationsResponse payload) {
-              return payload.getNextPageToken();
-            }
-
-            @Override
-            public Iterable<com.google.cloud.location.Location> extractResources(
-                ListLocationsResponse payload) {
-              return payload.getLocationsList() == null
-                  ? ImmutableList.<com.google.cloud.location.Location>of()
-                  : payload.getLocationsList();
-            }
-          };
-
-  private static final PagedListResponseFactory<
-          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      LIST_LOCATIONS_PAGE_STR_FACT =
-          new PagedListResponseFactory<
-              ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>() {
-            @Override
-            public ApiFuture<ListLocationsPagedResponse> getFuturePagedResponse(
-                UnaryCallable<ListLocationsRequest, ListLocationsResponse> callable,
-                ListLocationsRequest request,
-                ApiCallContext context,
-                ApiFuture<ListLocationsResponse> futureResponse) {
-              PageContext<
-                      ListLocationsRequest,
-                      ListLocationsResponse,
-                      com.google.cloud.location.Location>
-                  pageContext =
-                      PageContext.create(callable, LIST_LOCATIONS_PAGE_STR_DESC, request, context);
-              return ListLocationsPagedResponse.createAsync(pageContext, futureResponse);
-            }
-          };
-
-  /** Returns the object with the settings used for calls to doSomething. */
-  public UnaryCallSettings<Request, Operation> doSomethingSettings() {
-    return doSomethingSettings;
-  }
-
-  /** Returns the object with the settings used for calls to doSomething. */
-  public OperationCallSettings<Request, Annotation, Location> doSomethingOperationSettings() {
-    return doSomethingOperationSettings;
-  }
-
-  /** Returns the object with the settings used for calls to listLocations. */
-  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      listLocationsSettings() {
-    return listLocationsSettings;
-  }
-
-  /** Returns the object with the settings used for calls to getLocation. */
-  public UnaryCallSettings<GetLocationRequest, com.google.cloud.location.Location>
-      getLocationSettings() {
-    return getLocationSettings;
-  }
-
-  public CollisionsStub createStub() throws IOException {
-    if (getTransportChannelProvider()
-        .getTransportName()
-        .equals(GrpcTransportChannel.getGrpcTransportName())) {
-      return GrpcCollisionsStub.create(this);
-    }
-    if (getTransportChannelProvider()
-        .getTransportName()
-        .equals(HttpJsonTransportChannel.getHttpJsonTransportName())) {
-      return HttpJsonCollisionsStub.create(this);
-    }
-    throw new UnsupportedOperationException(
-        String.format(
-            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
-  }
-
-  /** Returns a builder for the default ExecutorProvider for this service. */
-  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
-    return InstantiatingExecutorProvider.newBuilder();
-  }
-
-  /** Returns the default service endpoint. */
-  public static String getDefaultEndpoint() {
-    return "localhost:7469";
-  }
-
-  /** Returns the default mTLS service endpoint. */
-  public static String getDefaultMtlsEndpoint() {
-    return "localhost:7469";
-  }
-
-  /** Returns the default service scopes. */
-  public static List<String> getDefaultServiceScopes() {
-    return DEFAULT_SERVICE_SCOPES;
-  }
-
-  /** Returns a builder for the default credentials for this service. */
-  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
-    return GoogleCredentialsProvider.newBuilder()
-        .setScopesToApply(DEFAULT_SERVICE_SCOPES)
-        .setUseJwtAccessWithScope(true);
-  }
-
-  /** Returns a builder for the default gRPC ChannelProvider for this service. */
-  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
-    return InstantiatingGrpcChannelProvider.newBuilder()
-        .setMaxInboundMessageSize(Integer.MAX_VALUE);
-  }
-
-  /** Returns a builder for the default REST ChannelProvider for this service. */
-  @BetaApi
-  public static InstantiatingHttpJsonChannelProvider.Builder
-      defaultHttpJsonTransportProviderBuilder() {
-    return InstantiatingHttpJsonChannelProvider.newBuilder();
-  }
-
-  public static TransportChannelProvider defaultTransportChannelProvider() {
-    return defaultGrpcTransportProviderBuilder().build();
-  }
-
-  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultGrpcApiClientHeaderProviderBuilder() {
-    return ApiClientHeaderProvider.newBuilder()
-        .setGeneratedLibToken(
-            "gapic", GaxProperties.getLibraryVersion(CollisionsStubSettings.class))
-        .setTransportToken(
-            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
-  }
-
-  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultHttpJsonApiClientHeaderProviderBuilder() {
-    return ApiClientHeaderProvider.newBuilder()
-        .setGeneratedLibToken(
-            "gapic", GaxProperties.getLibraryVersion(CollisionsStubSettings.class))
-        .setTransportToken(
-            GaxHttpJsonProperties.getHttpJsonTokenName(),
-            GaxHttpJsonProperties.getHttpJsonVersion());
-  }
-
-  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
-    return CollisionsStubSettings.defaultGrpcApiClientHeaderProviderBuilder();
-  }
-
-  /** Returns a new gRPC builder for this class. */
-  public static Builder newBuilder() {
-    return Builder.createDefault();
-  }
-
-  /** Returns a new REST builder for this class. */
-  public static Builder newHttpJsonBuilder() {
-    return Builder.createHttpJsonDefault();
-  }
-
-  /** Returns a new builder for this class. */
-  public static Builder newBuilder(ClientContext clientContext) {
-    return new Builder(clientContext);
-  }
-
-  /** Returns a builder containing all the values of this settings class. */
-  public Builder toBuilder() {
-    return new Builder(this);
-  }
-
-  protected CollisionsStubSettings(Builder settingsBuilder) throws IOException {
-    super(settingsBuilder);
-
-    doSomethingSettings = settingsBuilder.doSomethingSettings().build();
-    doSomethingOperationSettings = settingsBuilder.doSomethingOperationSettings().build();
-    listLocationsSettings = settingsBuilder.listLocationsSettings().build();
-    getLocationSettings = settingsBuilder.getLocationSettings().build();
-  }
-
-  /** Builder for CollisionsStubSettings. */
-  public static class Builder extends StubSettings.Builder<CollisionsStubSettings, Builder> {
-    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
-    private final UnaryCallSettings.Builder<Request, Operation> doSomethingSettings;
-    private final OperationCallSettings.Builder<Request, Annotation, Location>
-        doSomethingOperationSettings;
-    private final PagedCallSettings.Builder<
-            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-        listLocationsSettings;
-    private final UnaryCallSettings.Builder<GetLocationRequest, com.google.cloud.location.Location>
-        getLocationSettings;
-    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
-        RETRYABLE_CODE_DEFINITIONS;
-
-    static {
-      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
-          ImmutableMap.builder();
-      definitions.put("no_retry_codes", ImmutableSet.copyOf(Lists.<StatusCode.Code>newArrayList()));
-      RETRYABLE_CODE_DEFINITIONS = definitions.build();
-    }
-
-    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
-
-    static {
-      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
-      RetrySettings settings = null;
-      settings = RetrySettings.newBuilder().setRpcTimeoutMultiplier(1.0).build();
-      definitions.put("no_retry_params", settings);
-      RETRY_PARAM_DEFINITIONS = definitions.build();
-    }
-
-    protected Builder() {
-      this(((ClientContext) null));
-    }
-
-    protected Builder(ClientContext clientContext) {
-      super(clientContext);
-
-      doSomethingSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
-      doSomethingOperationSettings = OperationCallSettings.newBuilder();
-      listLocationsSettings = PagedCallSettings.newBuilder(LIST_LOCATIONS_PAGE_STR_FACT);
-      getLocationSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
-
-      unaryMethodSettingsBuilders =
-          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
-              doSomethingSettings, listLocationsSettings, getLocationSettings);
-      initDefaults(this);
-    }
-
-    protected Builder(CollisionsStubSettings settings) {
-      super(settings);
-
-      doSomethingSettings = settings.doSomethingSettings.toBuilder();
-      doSomethingOperationSettings = settings.doSomethingOperationSettings.toBuilder();
-      listLocationsSettings = settings.listLocationsSettings.toBuilder();
-      getLocationSettings = settings.getLocationSettings.toBuilder();
-
-      unaryMethodSettingsBuilders =
-          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
-              doSomethingSettings, listLocationsSettings, getLocationSettings);
-    }
-
-    private static Builder createDefault() {
-      Builder builder = new Builder(((ClientContext) null));
-
-      builder.setTransportChannelProvider(defaultTransportChannelProvider());
-      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
-      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
-      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
-      builder.setSwitchToMtlsEndpointAllowed(true);
-
-      return initDefaults(builder);
-    }
-
-    private static Builder createHttpJsonDefault() {
-      Builder builder = new Builder(((ClientContext) null));
-
-      builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
-      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
-      builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
-      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
-      builder.setSwitchToMtlsEndpointAllowed(true);
-
-      return initDefaults(builder);
-    }
-
-    private static Builder initDefaults(Builder builder) {
-      builder
-          .doSomethingSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
-
-      builder
-          .listLocationsSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
-
-      builder
-          .getLocationSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
-
-      builder
-          .doSomethingOperationSettings()
-          .setInitialCallSettings(
-              UnaryCallSettings.<Request, OperationSnapshot>newUnaryCallSettingsBuilder()
-                  .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-                  .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"))
-                  .build())
-          .setResponseTransformer(
-              ProtoOperationTransformers.ResponseTransformer.create(Annotation.class))
-          .setMetadataTransformer(
-              ProtoOperationTransformers.MetadataTransformer.create(Location.class))
-          .setPollingAlgorithm(
-              OperationTimedPollAlgorithm.create(
-                  RetrySettings.newBuilder()
-                      .setInitialRetryDelay(Duration.ofMillis(5000L))
-                      .setRetryDelayMultiplier(1.5)
-                      .setMaxRetryDelay(Duration.ofMillis(45000L))
-                      .setInitialRpcTimeout(Duration.ZERO)
-                      .setRpcTimeoutMultiplier(1.0)
-                      .setMaxRpcTimeout(Duration.ZERO)
-                      .setTotalTimeout(Duration.ofMillis(300000L))
-                      .build()));
-
-      return builder;
-    }
-
-    /**
-     * Applies the given settings updater function to all of the unary API methods in this service.
-     *
-     * <p>Note: This method does not support applying settings to streaming methods.
-     */
-    public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
-      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
-      return this;
-    }
-
-    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
-      return unaryMethodSettingsBuilders;
-    }
-
-    /** Returns the builder for the settings used for calls to doSomething. */
-    public UnaryCallSettings.Builder<Request, Operation> doSomethingSettings() {
-      return doSomethingSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to doSomething. */
-    @BetaApi(
-        "The surface for use by generated code is not stable yet and may change in the future.")
-    public OperationCallSettings.Builder<Request, Annotation, Location>
-        doSomethingOperationSettings() {
-      return doSomethingOperationSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to listLocations. */
-    public PagedCallSettings.Builder<
-            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-        listLocationsSettings() {
-      return listLocationsSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to getLocation. */
-    public UnaryCallSettings.Builder<GetLocationRequest, com.google.cloud.location.Location>
-        getLocationSettings() {
-      return getLocationSettings;
-    }
-
-    @Override
-    public CollisionsStubSettings build() throws IOException {
-      return new CollisionsStubSettings(this);
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
deleted file mode 100644
index ef0ea02f4d..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsCallableFactory.java
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.grpc.GrpcCallSettings;
-import com.google.api.gax.grpc.GrpcCallableFactory;
-import com.google.api.gax.grpc.GrpcStubCallableFactory;
-import com.google.api.gax.rpc.BatchingCallSettings;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.OperationCallSettings;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallable;
-import com.google.api.gax.rpc.StreamingCallSettings;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.longrunning.Operation;
-import com.google.longrunning.stub.OperationsStub;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * gRPC callable factory implementation for the Collisions service API.
- *
- * <p>This class is for advanced usage.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class GrpcCollisionsCallableFactory implements GrpcStubCallableFactory {
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
-      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-      UnaryCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT, PagedListResponseT>
-      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
-      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-      BatchingCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return GrpcCallableFactory.createBatchingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT, MetadataT>
-      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
-          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
-          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
-          ClientContext clientContext,
-          OperationsStub operationsStub) {
-    return GrpcCallableFactory.createOperationCallable(
-        grpcCallSettings, callSettings, clientContext, operationsStub);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          StreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createBidiStreamingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createServerStreamingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          StreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createClientStreamingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
deleted file mode 100644
index c528dfc90e..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcCollisionsStub.java
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.core.BackgroundResourceAggregation;
-import com.google.api.gax.grpc.GrpcCallSettings;
-import com.google.api.gax.grpc.GrpcStubCallableFactory;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.ImmutableMap;
-import com.google.longrunning.Operation;
-import com.google.longrunning.stub.GrpcOperationsStub;
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Request;
-import io.grpc.MethodDescriptor;
-import io.grpc.protobuf.ProtoUtils;
-import java.io.IOException;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * gRPC stub implementation for the Collisions service API.
- *
- * <p>This class is for advanced usage and reflects the underlying API directly.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class GrpcCollisionsStub extends CollisionsStub {
-  private static final MethodDescriptor<Request, Operation> doSomethingMethodDescriptor =
-      MethodDescriptor.<Request, Operation>newBuilder()
-          .setType(MethodDescriptor.MethodType.UNARY)
-          .setFullMethodName("google.showcase.v1beta1.Collisions/doSomething")
-          .setRequestMarshaller(ProtoUtils.marshaller(Request.getDefaultInstance()))
-          .setResponseMarshaller(ProtoUtils.marshaller(Operation.getDefaultInstance()))
-          .build();
-
-  private static final MethodDescriptor<ListLocationsRequest, ListLocationsResponse>
-      listLocationsMethodDescriptor =
-          MethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-              .setType(MethodDescriptor.MethodType.UNARY)
-              .setFullMethodName("google.cloud.location.Locations/ListLocations")
-              .setRequestMarshaller(
-                  ProtoUtils.marshaller(ListLocationsRequest.getDefaultInstance()))
-              .setResponseMarshaller(
-                  ProtoUtils.marshaller(ListLocationsResponse.getDefaultInstance()))
-              .build();
-
-  private static final MethodDescriptor<GetLocationRequest, Location> getLocationMethodDescriptor =
-      MethodDescriptor.<GetLocationRequest, Location>newBuilder()
-          .setType(MethodDescriptor.MethodType.UNARY)
-          .setFullMethodName("google.cloud.location.Locations/GetLocation")
-          .setRequestMarshaller(ProtoUtils.marshaller(GetLocationRequest.getDefaultInstance()))
-          .setResponseMarshaller(ProtoUtils.marshaller(Location.getDefaultInstance()))
-          .build();
-
-  private final UnaryCallable<Request, Operation> doSomethingCallable;
-  private final OperationCallable<Request, Annotation, com.google.showcase.v1beta1.Location>
-      doSomethingOperationCallable;
-  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
-  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable;
-  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
-
-  private final BackgroundResource backgroundResources;
-  private final GrpcOperationsStub operationsStub;
-  private final GrpcStubCallableFactory callableFactory;
-
-  public static final GrpcCollisionsStub create(CollisionsStubSettings settings)
-      throws IOException {
-    return new GrpcCollisionsStub(settings, ClientContext.create(settings));
-  }
-
-  public static final GrpcCollisionsStub create(ClientContext clientContext) throws IOException {
-    return new GrpcCollisionsStub(CollisionsStubSettings.newBuilder().build(), clientContext);
-  }
-
-  public static final GrpcCollisionsStub create(
-      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
-    return new GrpcCollisionsStub(
-        CollisionsStubSettings.newBuilder().build(), clientContext, callableFactory);
-  }
-
-  /**
-   * Constructs an instance of GrpcCollisionsStub, using the given settings. This is protected so
-   * that it is easy to make a subclass, but otherwise, the static factory methods should be
-   * preferred.
-   */
-  protected GrpcCollisionsStub(CollisionsStubSettings settings, ClientContext clientContext)
-      throws IOException {
-    this(settings, clientContext, new GrpcCollisionsCallableFactory());
-  }
-
-  /**
-   * Constructs an instance of GrpcCollisionsStub, using the given settings. This is protected so
-   * that it is easy to make a subclass, but otherwise, the static factory methods should be
-   * preferred.
-   */
-  protected GrpcCollisionsStub(
-      CollisionsStubSettings settings,
-      ClientContext clientContext,
-      GrpcStubCallableFactory callableFactory)
-      throws IOException {
-    this.callableFactory = callableFactory;
-    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
-
-    GrpcCallSettings<Request, Operation> doSomethingTransportSettings =
-        GrpcCallSettings.<Request, Operation>newBuilder()
-            .setMethodDescriptor(doSomethingMethodDescriptor)
-            .build();
-    GrpcCallSettings<ListLocationsRequest, ListLocationsResponse> listLocationsTransportSettings =
-        GrpcCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-            .setMethodDescriptor(listLocationsMethodDescriptor)
-            .setParamsExtractor(
-                request -> {
-                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                  params.put("name", String.valueOf(request.getName()));
-                  return params.build();
-                })
-            .build();
-    GrpcCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
-        GrpcCallSettings.<GetLocationRequest, Location>newBuilder()
-            .setMethodDescriptor(getLocationMethodDescriptor)
-            .setParamsExtractor(
-                request -> {
-                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                  params.put("name", String.valueOf(request.getName()));
-                  return params.build();
-                })
-            .build();
-
-    this.doSomethingCallable =
-        callableFactory.createUnaryCallable(
-            doSomethingTransportSettings, settings.doSomethingSettings(), clientContext);
-    this.doSomethingOperationCallable =
-        callableFactory.createOperationCallable(
-            doSomethingTransportSettings,
-            settings.doSomethingOperationSettings(),
-            clientContext,
-            operationsStub);
-    this.listLocationsCallable =
-        callableFactory.createUnaryCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.listLocationsPagedCallable =
-        callableFactory.createPagedCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.getLocationCallable =
-        callableFactory.createUnaryCallable(
-            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
-
-    this.backgroundResources =
-        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
-  }
-
-  public GrpcOperationsStub getOperationsStub() {
-    return operationsStub;
-  }
-
-  @Override
-  public UnaryCallable<Request, Operation> doSomethingCallable() {
-    return doSomethingCallable;
-  }
-
-  @Override
-  public OperationCallable<Request, Annotation, com.google.showcase.v1beta1.Location>
-      doSomethingOperationCallable() {
-    return doSomethingOperationCallable;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    return listLocationsCallable;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    return listLocationsPagedCallable;
-  }
-
-  @Override
-  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
-    return getLocationCallable;
-  }
-
-  @Override
-  public final void close() {
-    try {
-      backgroundResources.close();
-    } catch (RuntimeException e) {
-      throw e;
-    } catch (Exception e) {
-      throw new IllegalStateException("Failed to close resource", e);
-    }
-  }
-
-  @Override
-  public void shutdown() {
-    backgroundResources.shutdown();
-  }
-
-  @Override
-  public boolean isShutdown() {
-    return backgroundResources.isShutdown();
-  }
-
-  @Override
-  public boolean isTerminated() {
-    return backgroundResources.isTerminated();
-  }
-
-  @Override
-  public void shutdownNow() {
-    backgroundResources.shutdownNow();
-  }
-
-  @Override
-  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
-    return backgroundResources.awaitTermination(duration, unit);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
deleted file mode 100644
index 388b417f03..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedCallableFactory.java
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.grpc.GrpcCallSettings;
-import com.google.api.gax.grpc.GrpcCallableFactory;
-import com.google.api.gax.grpc.GrpcStubCallableFactory;
-import com.google.api.gax.rpc.BatchingCallSettings;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.OperationCallSettings;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallable;
-import com.google.api.gax.rpc.StreamingCallSettings;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.longrunning.Operation;
-import com.google.longrunning.stub.OperationsStub;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * gRPC callable factory implementation for the Wicked service API.
- *
- * <p>This class is for advanced usage.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class GrpcWickedCallableFactory implements GrpcStubCallableFactory {
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
-      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-      UnaryCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT, PagedListResponseT>
-      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
-      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-      BatchingCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return GrpcCallableFactory.createBatchingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT, MetadataT>
-      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
-          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
-          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
-          ClientContext clientContext,
-          OperationsStub operationsStub) {
-    return GrpcCallableFactory.createOperationCallable(
-        grpcCallSettings, callSettings, clientContext, operationsStub);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          StreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createBidiStreamingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createServerStreamingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
-          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
-          StreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return GrpcCallableFactory.createClientStreamingCallable(
-        grpcCallSettings, callSettings, clientContext);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
deleted file mode 100644
index c3e680dee2..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/GrpcWickedStub.java
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.core.BackgroundResourceAggregation;
-import com.google.api.gax.grpc.GrpcCallSettings;
-import com.google.api.gax.grpc.GrpcStubCallableFactory;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.ImmutableMap;
-import com.google.longrunning.stub.GrpcOperationsStub;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import io.grpc.MethodDescriptor;
-import io.grpc.protobuf.ProtoUtils;
-import java.io.IOException;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * gRPC stub implementation for the Wicked service API.
- *
- * <p>This class is for advanced usage and reflects the underlying API directly.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class GrpcWickedStub extends WickedStub {
-  private static final MethodDescriptor<EvilRequest, EvilResponse> craftEvilPlanMethodDescriptor =
-      MethodDescriptor.<EvilRequest, EvilResponse>newBuilder()
-          .setType(MethodDescriptor.MethodType.UNARY)
-          .setFullMethodName("google.showcase.v1beta1.Wicked/CraftEvilPlan")
-          .setRequestMarshaller(ProtoUtils.marshaller(EvilRequest.getDefaultInstance()))
-          .setResponseMarshaller(ProtoUtils.marshaller(EvilResponse.getDefaultInstance()))
-          .build();
-
-  private static final MethodDescriptor<EvilRequest, EvilResponse>
-      brainstormEvilPlansMethodDescriptor =
-          MethodDescriptor.<EvilRequest, EvilResponse>newBuilder()
-              .setType(MethodDescriptor.MethodType.BIDI_STREAMING)
-              .setFullMethodName("google.showcase.v1beta1.Wicked/BrainstormEvilPlans")
-              .setRequestMarshaller(ProtoUtils.marshaller(EvilRequest.getDefaultInstance()))
-              .setResponseMarshaller(ProtoUtils.marshaller(EvilResponse.getDefaultInstance()))
-              .build();
-
-  private static final MethodDescriptor<EvilRequest, EvilResponse>
-      persuadeEvilPlanMethodDescriptor =
-          MethodDescriptor.<EvilRequest, EvilResponse>newBuilder()
-              .setType(MethodDescriptor.MethodType.CLIENT_STREAMING)
-              .setFullMethodName("google.showcase.v1beta1.Wicked/PersuadeEvilPlan")
-              .setRequestMarshaller(ProtoUtils.marshaller(EvilRequest.getDefaultInstance()))
-              .setResponseMarshaller(ProtoUtils.marshaller(EvilResponse.getDefaultInstance()))
-              .build();
-
-  private static final MethodDescriptor<ListLocationsRequest, ListLocationsResponse>
-      listLocationsMethodDescriptor =
-          MethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-              .setType(MethodDescriptor.MethodType.UNARY)
-              .setFullMethodName("google.cloud.location.Locations/ListLocations")
-              .setRequestMarshaller(
-                  ProtoUtils.marshaller(ListLocationsRequest.getDefaultInstance()))
-              .setResponseMarshaller(
-                  ProtoUtils.marshaller(ListLocationsResponse.getDefaultInstance()))
-              .build();
-
-  private static final MethodDescriptor<GetLocationRequest, Location> getLocationMethodDescriptor =
-      MethodDescriptor.<GetLocationRequest, Location>newBuilder()
-          .setType(MethodDescriptor.MethodType.UNARY)
-          .setFullMethodName("google.cloud.location.Locations/GetLocation")
-          .setRequestMarshaller(ProtoUtils.marshaller(GetLocationRequest.getDefaultInstance()))
-          .setResponseMarshaller(ProtoUtils.marshaller(Location.getDefaultInstance()))
-          .build();
-
-  private final UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable;
-  private final BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable;
-  private final ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable;
-  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
-  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable;
-  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
-
-  private final BackgroundResource backgroundResources;
-  private final GrpcOperationsStub operationsStub;
-  private final GrpcStubCallableFactory callableFactory;
-
-  public static final GrpcWickedStub create(WickedStubSettings settings) throws IOException {
-    return new GrpcWickedStub(settings, ClientContext.create(settings));
-  }
-
-  public static final GrpcWickedStub create(ClientContext clientContext) throws IOException {
-    return new GrpcWickedStub(WickedStubSettings.newBuilder().build(), clientContext);
-  }
-
-  public static final GrpcWickedStub create(
-      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
-    return new GrpcWickedStub(
-        WickedStubSettings.newBuilder().build(), clientContext, callableFactory);
-  }
-
-  /**
-   * Constructs an instance of GrpcWickedStub, using the given settings. This is protected so that
-   * it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
-   */
-  protected GrpcWickedStub(WickedStubSettings settings, ClientContext clientContext)
-      throws IOException {
-    this(settings, clientContext, new GrpcWickedCallableFactory());
-  }
-
-  /**
-   * Constructs an instance of GrpcWickedStub, using the given settings. This is protected so that
-   * it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
-   */
-  protected GrpcWickedStub(
-      WickedStubSettings settings,
-      ClientContext clientContext,
-      GrpcStubCallableFactory callableFactory)
-      throws IOException {
-    this.callableFactory = callableFactory;
-    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
-
-    GrpcCallSettings<EvilRequest, EvilResponse> craftEvilPlanTransportSettings =
-        GrpcCallSettings.<EvilRequest, EvilResponse>newBuilder()
-            .setMethodDescriptor(craftEvilPlanMethodDescriptor)
-            .build();
-    GrpcCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansTransportSettings =
-        GrpcCallSettings.<EvilRequest, EvilResponse>newBuilder()
-            .setMethodDescriptor(brainstormEvilPlansMethodDescriptor)
-            .build();
-    GrpcCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanTransportSettings =
-        GrpcCallSettings.<EvilRequest, EvilResponse>newBuilder()
-            .setMethodDescriptor(persuadeEvilPlanMethodDescriptor)
-            .build();
-    GrpcCallSettings<ListLocationsRequest, ListLocationsResponse> listLocationsTransportSettings =
-        GrpcCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-            .setMethodDescriptor(listLocationsMethodDescriptor)
-            .setParamsExtractor(
-                request -> {
-                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                  params.put("name", String.valueOf(request.getName()));
-                  return params.build();
-                })
-            .build();
-    GrpcCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
-        GrpcCallSettings.<GetLocationRequest, Location>newBuilder()
-            .setMethodDescriptor(getLocationMethodDescriptor)
-            .setParamsExtractor(
-                request -> {
-                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                  params.put("name", String.valueOf(request.getName()));
-                  return params.build();
-                })
-            .build();
-
-    this.craftEvilPlanCallable =
-        callableFactory.createUnaryCallable(
-            craftEvilPlanTransportSettings, settings.craftEvilPlanSettings(), clientContext);
-    this.brainstormEvilPlansCallable =
-        callableFactory.createBidiStreamingCallable(
-            brainstormEvilPlansTransportSettings,
-            settings.brainstormEvilPlansSettings(),
-            clientContext);
-    this.persuadeEvilPlanCallable =
-        callableFactory.createClientStreamingCallable(
-            persuadeEvilPlanTransportSettings, settings.persuadeEvilPlanSettings(), clientContext);
-    this.listLocationsCallable =
-        callableFactory.createUnaryCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.listLocationsPagedCallable =
-        callableFactory.createPagedCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.getLocationCallable =
-        callableFactory.createUnaryCallable(
-            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
-
-    this.backgroundResources =
-        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
-  }
-
-  public GrpcOperationsStub getOperationsStub() {
-    return operationsStub;
-  }
-
-  @Override
-  public UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
-    return craftEvilPlanCallable;
-  }
-
-  @Override
-  public BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
-    return brainstormEvilPlansCallable;
-  }
-
-  @Override
-  public ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
-    return persuadeEvilPlanCallable;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    return listLocationsCallable;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    return listLocationsPagedCallable;
-  }
-
-  @Override
-  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
-    return getLocationCallable;
-  }
-
-  @Override
-  public final void close() {
-    try {
-      backgroundResources.close();
-    } catch (RuntimeException e) {
-      throw e;
-    } catch (Exception e) {
-      throw new IllegalStateException("Failed to close resource", e);
-    }
-  }
-
-  @Override
-  public void shutdown() {
-    backgroundResources.shutdown();
-  }
-
-  @Override
-  public boolean isShutdown() {
-    return backgroundResources.isShutdown();
-  }
-
-  @Override
-  public boolean isTerminated() {
-    return backgroundResources.isTerminated();
-  }
-
-  @Override
-  public void shutdownNow() {
-    backgroundResources.shutdownNow();
-  }
-
-  @Override
-  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
-    return backgroundResources.awaitTermination(duration, unit);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
deleted file mode 100644
index 0da4f298cc..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsCallableFactory.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.httpjson.HttpJsonCallSettings;
-import com.google.api.gax.httpjson.HttpJsonCallableFactory;
-import com.google.api.gax.httpjson.HttpJsonOperationSnapshotCallable;
-import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
-import com.google.api.gax.httpjson.longrunning.stub.OperationsStub;
-import com.google.api.gax.rpc.BatchingCallSettings;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.OperationCallSettings;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallable;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.longrunning.Operation;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * REST callable factory implementation for the Collisions service API.
- *
- * <p>This class is for advanced usage.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class HttpJsonCollisionsCallableFactory
-    implements HttpJsonStubCallableFactory<Operation, OperationsStub> {
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
-      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-      UnaryCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return HttpJsonCallableFactory.createUnaryCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT, PagedListResponseT>
-      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
-          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
-          ClientContext clientContext) {
-    return HttpJsonCallableFactory.createPagedCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
-      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-      BatchingCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return HttpJsonCallableFactory.createBatchingCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-
-  @BetaApi(
-      "The surface for long-running operations is not stable yet and may change in the future.")
-  @Override
-  public <RequestT, ResponseT, MetadataT>
-      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
-          HttpJsonCallSettings<RequestT, Operation> httpJsonCallSettings,
-          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
-          ClientContext clientContext,
-          OperationsStub operationsStub) {
-    UnaryCallable<RequestT, Operation> innerCallable =
-        HttpJsonCallableFactory.createBaseUnaryCallable(
-            httpJsonCallSettings, callSettings.getInitialCallSettings(), clientContext);
-    HttpJsonOperationSnapshotCallable<RequestT, Operation> initialCallable =
-        new HttpJsonOperationSnapshotCallable<RequestT, Operation>(
-            innerCallable,
-            httpJsonCallSettings.getMethodDescriptor().getOperationSnapshotFactory());
-    return HttpJsonCallableFactory.createOperationCallable(
-        callSettings, clientContext, operationsStub.longRunningClient(), initialCallable);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
-          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return HttpJsonCallableFactory.createServerStreamingCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
deleted file mode 100644
index 601ad4b35c..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonCollisionsStub.java
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.HttpRule;
-import com.google.api.core.BetaApi;
-import com.google.api.core.InternalApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.core.BackgroundResourceAggregation;
-import com.google.api.gax.httpjson.ApiMethodDescriptor;
-import com.google.api.gax.httpjson.HttpJsonCallSettings;
-import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
-import com.google.api.gax.httpjson.ProtoMessageRequestFormatter;
-import com.google.api.gax.httpjson.ProtoMessageResponseParser;
-import com.google.api.gax.httpjson.ProtoRestSerializer;
-import com.google.api.gax.httpjson.longrunning.stub.HttpJsonOperationsStub;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.common.collect.ImmutableMap;
-import com.google.longrunning.Operation;
-import com.google.protobuf.TypeRegistry;
-import com.google.showcase.v1beta1.Annotation;
-import com.google.showcase.v1beta1.Location;
-import com.google.showcase.v1beta1.Request;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * REST stub implementation for the Collisions service API.
- *
- * <p>This class is for advanced usage and reflects the underlying API directly.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class HttpJsonCollisionsStub extends CollisionsStub {
-  private static final TypeRegistry typeRegistry =
-      TypeRegistry.newBuilder()
-          .add(Location.getDescriptor())
-          .add(Annotation.getDescriptor())
-          .build();
-
-  private static final ApiMethodDescriptor<ListLocationsRequest, ListLocationsResponse>
-      listLocationsMethodDescriptor =
-          ApiMethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-              .setFullMethodName("google.cloud.location.Locations/ListLocations")
-              .setHttpMethod("GET")
-              .setType(ApiMethodDescriptor.MethodType.UNARY)
-              .setRequestFormatter(
-                  ProtoMessageRequestFormatter.<ListLocationsRequest>newBuilder()
-                      .setPath(
-                          "/v1beta1/{name=projects/*}/locations",
-                          request -> {
-                            Map<String, String> fields = new HashMap<>();
-                            ProtoRestSerializer<ListLocationsRequest> serializer =
-                                ProtoRestSerializer.create();
-                            serializer.putPathParam(fields, "name", request.getName());
-                            return fields;
-                          })
-                      .setQueryParamsExtractor(
-                          request -> {
-                            Map<String, List<String>> fields = new HashMap<>();
-                            ProtoRestSerializer<ListLocationsRequest> serializer =
-                                ProtoRestSerializer.create();
-                            return fields;
-                          })
-                      .setRequestBodyExtractor(request -> null)
-                      .build())
-              .setResponseParser(
-                  ProtoMessageResponseParser.<ListLocationsResponse>newBuilder()
-                      .setDefaultInstance(ListLocationsResponse.getDefaultInstance())
-                      .setDefaultTypeRegistry(typeRegistry)
-                      .build())
-              .build();
-
-  private static final ApiMethodDescriptor<GetLocationRequest, com.google.cloud.location.Location>
-      getLocationMethodDescriptor =
-          ApiMethodDescriptor.<GetLocationRequest, com.google.cloud.location.Location>newBuilder()
-              .setFullMethodName("google.cloud.location.Locations/GetLocation")
-              .setHttpMethod("GET")
-              .setType(ApiMethodDescriptor.MethodType.UNARY)
-              .setRequestFormatter(
-                  ProtoMessageRequestFormatter.<GetLocationRequest>newBuilder()
-                      .setPath(
-                          "/v1beta1/{name=projects/*/locations/*}",
-                          request -> {
-                            Map<String, String> fields = new HashMap<>();
-                            ProtoRestSerializer<GetLocationRequest> serializer =
-                                ProtoRestSerializer.create();
-                            serializer.putPathParam(fields, "name", request.getName());
-                            return fields;
-                          })
-                      .setQueryParamsExtractor(
-                          request -> {
-                            Map<String, List<String>> fields = new HashMap<>();
-                            ProtoRestSerializer<GetLocationRequest> serializer =
-                                ProtoRestSerializer.create();
-                            return fields;
-                          })
-                      .setRequestBodyExtractor(request -> null)
-                      .build())
-              .setResponseParser(
-                  ProtoMessageResponseParser.<com.google.cloud.location.Location>newBuilder()
-                      .setDefaultInstance(com.google.cloud.location.Location.getDefaultInstance())
-                      .setDefaultTypeRegistry(typeRegistry)
-                      .build())
-              .build();
-
-  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
-  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable;
-  private final UnaryCallable<GetLocationRequest, com.google.cloud.location.Location>
-      getLocationCallable;
-
-  private final BackgroundResource backgroundResources;
-  private final HttpJsonOperationsStub httpJsonOperationsStub;
-  private final HttpJsonStubCallableFactory callableFactory;
-
-  public static final HttpJsonCollisionsStub create(CollisionsStubSettings settings)
-      throws IOException {
-    return new HttpJsonCollisionsStub(settings, ClientContext.create(settings));
-  }
-
-  public static final HttpJsonCollisionsStub create(ClientContext clientContext)
-      throws IOException {
-    return new HttpJsonCollisionsStub(
-        CollisionsStubSettings.newHttpJsonBuilder().build(), clientContext);
-  }
-
-  public static final HttpJsonCollisionsStub create(
-      ClientContext clientContext, HttpJsonStubCallableFactory callableFactory) throws IOException {
-    return new HttpJsonCollisionsStub(
-        CollisionsStubSettings.newHttpJsonBuilder().build(), clientContext, callableFactory);
-  }
-
-  /**
-   * Constructs an instance of HttpJsonCollisionsStub, using the given settings. This is protected
-   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
-   * preferred.
-   */
-  protected HttpJsonCollisionsStub(CollisionsStubSettings settings, ClientContext clientContext)
-      throws IOException {
-    this(settings, clientContext, new HttpJsonCollisionsCallableFactory());
-  }
-
-  /**
-   * Constructs an instance of HttpJsonCollisionsStub, using the given settings. This is protected
-   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
-   * preferred.
-   */
-  protected HttpJsonCollisionsStub(
-      CollisionsStubSettings settings,
-      ClientContext clientContext,
-      HttpJsonStubCallableFactory callableFactory)
-      throws IOException {
-    this.callableFactory = callableFactory;
-    this.httpJsonOperationsStub =
-        HttpJsonOperationsStub.create(
-            clientContext,
-            callableFactory,
-            typeRegistry,
-            ImmutableMap.<String, HttpRule>builder()
-                .put(
-                    "google.longrunning.Operations.CancelOperation",
-                    HttpRule.newBuilder().setPost("/v1beta1/{name=operations/**}:cancel").build())
-                .put(
-                    "google.longrunning.Operations.DeleteOperation",
-                    HttpRule.newBuilder().setDelete("/v1beta1/{name=operations/**}").build())
-                .put(
-                    "google.longrunning.Operations.GetOperation",
-                    HttpRule.newBuilder().setGet("/v1beta1/{name=operations/**}").build())
-                .put(
-                    "google.longrunning.Operations.ListOperations",
-                    HttpRule.newBuilder().setGet("/v1beta1/operations").build())
-                .build());
-
-    HttpJsonCallSettings<ListLocationsRequest, ListLocationsResponse>
-        listLocationsTransportSettings =
-            HttpJsonCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-                .setMethodDescriptor(listLocationsMethodDescriptor)
-                .setTypeRegistry(typeRegistry)
-                .build();
-    HttpJsonCallSettings<GetLocationRequest, com.google.cloud.location.Location>
-        getLocationTransportSettings =
-            HttpJsonCallSettings
-                .<GetLocationRequest, com.google.cloud.location.Location>newBuilder()
-                .setMethodDescriptor(getLocationMethodDescriptor)
-                .setTypeRegistry(typeRegistry)
-                .build();
-
-    this.listLocationsCallable =
-        callableFactory.createUnaryCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.listLocationsPagedCallable =
-        callableFactory.createPagedCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.getLocationCallable =
-        callableFactory.createUnaryCallable(
-            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
-
-    this.backgroundResources =
-        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
-  }
-
-  @InternalApi
-  public static List<ApiMethodDescriptor> getMethodDescriptors() {
-    List<ApiMethodDescriptor> methodDescriptors = new ArrayList<>();
-    methodDescriptors.add(listLocationsMethodDescriptor);
-    methodDescriptors.add(getLocationMethodDescriptor);
-    return methodDescriptors;
-  }
-
-  public HttpJsonOperationsStub getHttpJsonOperationsStub() {
-    return httpJsonOperationsStub;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    return listLocationsCallable;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    return listLocationsPagedCallable;
-  }
-
-  @Override
-  public UnaryCallable<GetLocationRequest, com.google.cloud.location.Location>
-      getLocationCallable() {
-    return getLocationCallable;
-  }
-
-  @Override
-  public UnaryCallable<Request, Operation> doSomethingCallable() {
-    throw new UnsupportedOperationException(
-        "Not implemented: doSomethingCallable(). REST transport is not implemented for this method yet.");
-  }
-
-  @Override
-  public final void close() {
-    try {
-      backgroundResources.close();
-    } catch (RuntimeException e) {
-      throw e;
-    } catch (Exception e) {
-      throw new IllegalStateException("Failed to close resource", e);
-    }
-  }
-
-  @Override
-  public void shutdown() {
-    backgroundResources.shutdown();
-  }
-
-  @Override
-  public boolean isShutdown() {
-    return backgroundResources.isShutdown();
-  }
-
-  @Override
-  public boolean isTerminated() {
-    return backgroundResources.isTerminated();
-  }
-
-  @Override
-  public void shutdownNow() {
-    backgroundResources.shutdownNow();
-  }
-
-  @Override
-  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
-    return backgroundResources.awaitTermination(duration, unit);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
deleted file mode 100644
index 37726531b0..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedCallableFactory.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.httpjson.HttpJsonCallSettings;
-import com.google.api.gax.httpjson.HttpJsonCallableFactory;
-import com.google.api.gax.httpjson.HttpJsonOperationSnapshotCallable;
-import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
-import com.google.api.gax.httpjson.longrunning.stub.OperationsStub;
-import com.google.api.gax.rpc.BatchingCallSettings;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.OperationCallSettings;
-import com.google.api.gax.rpc.OperationCallable;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallSettings;
-import com.google.api.gax.rpc.ServerStreamingCallable;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.longrunning.Operation;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * REST callable factory implementation for the Wicked service API.
- *
- * <p>This class is for advanced usage.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class HttpJsonWickedCallableFactory
-    implements HttpJsonStubCallableFactory<Operation, OperationsStub> {
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
-      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-      UnaryCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return HttpJsonCallableFactory.createUnaryCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT, PagedListResponseT>
-      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
-          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
-          ClientContext clientContext) {
-    return HttpJsonCallableFactory.createPagedCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-
-  @Override
-  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
-      HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-      BatchingCallSettings<RequestT, ResponseT> callSettings,
-      ClientContext clientContext) {
-    return HttpJsonCallableFactory.createBatchingCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-
-  @BetaApi(
-      "The surface for long-running operations is not stable yet and may change in the future.")
-  @Override
-  public <RequestT, ResponseT, MetadataT>
-      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
-          HttpJsonCallSettings<RequestT, Operation> httpJsonCallSettings,
-          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
-          ClientContext clientContext,
-          OperationsStub operationsStub) {
-    UnaryCallable<RequestT, Operation> innerCallable =
-        HttpJsonCallableFactory.createBaseUnaryCallable(
-            httpJsonCallSettings, callSettings.getInitialCallSettings(), clientContext);
-    HttpJsonOperationSnapshotCallable<RequestT, Operation> initialCallable =
-        new HttpJsonOperationSnapshotCallable<RequestT, Operation>(
-            innerCallable,
-            httpJsonCallSettings.getMethodDescriptor().getOperationSnapshotFactory());
-    return HttpJsonCallableFactory.createOperationCallable(
-        callSettings, clientContext, operationsStub.longRunningClient(), initialCallable);
-  }
-
-  @Override
-  public <RequestT, ResponseT>
-      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
-          HttpJsonCallSettings<RequestT, ResponseT> httpJsonCallSettings,
-          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
-          ClientContext clientContext) {
-    return HttpJsonCallableFactory.createServerStreamingCallable(
-        httpJsonCallSettings, callSettings, clientContext);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
deleted file mode 100644
index d45cbba41e..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonWickedStub.java
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.core.BetaApi;
-import com.google.api.core.InternalApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.core.BackgroundResourceAggregation;
-import com.google.api.gax.httpjson.ApiMethodDescriptor;
-import com.google.api.gax.httpjson.HttpJsonCallSettings;
-import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
-import com.google.api.gax.httpjson.ProtoMessageRequestFormatter;
-import com.google.api.gax.httpjson.ProtoMessageResponseParser;
-import com.google.api.gax.httpjson.ProtoRestSerializer;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.protobuf.TypeRegistry;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * REST stub implementation for the Wicked service API.
- *
- * <p>This class is for advanced usage and reflects the underlying API directly.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class HttpJsonWickedStub extends WickedStub {
-  private static final TypeRegistry typeRegistry = TypeRegistry.newBuilder().build();
-
-  private static final ApiMethodDescriptor<ListLocationsRequest, ListLocationsResponse>
-      listLocationsMethodDescriptor =
-          ApiMethodDescriptor.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-              .setFullMethodName("google.cloud.location.Locations/ListLocations")
-              .setHttpMethod("GET")
-              .setType(ApiMethodDescriptor.MethodType.UNARY)
-              .setRequestFormatter(
-                  ProtoMessageRequestFormatter.<ListLocationsRequest>newBuilder()
-                      .setPath(
-                          "/v1beta1/{name=projects/*}/locations",
-                          request -> {
-                            Map<String, String> fields = new HashMap<>();
-                            ProtoRestSerializer<ListLocationsRequest> serializer =
-                                ProtoRestSerializer.create();
-                            serializer.putPathParam(fields, "name", request.getName());
-                            return fields;
-                          })
-                      .setQueryParamsExtractor(
-                          request -> {
-                            Map<String, List<String>> fields = new HashMap<>();
-                            ProtoRestSerializer<ListLocationsRequest> serializer =
-                                ProtoRestSerializer.create();
-                            return fields;
-                          })
-                      .setRequestBodyExtractor(request -> null)
-                      .build())
-              .setResponseParser(
-                  ProtoMessageResponseParser.<ListLocationsResponse>newBuilder()
-                      .setDefaultInstance(ListLocationsResponse.getDefaultInstance())
-                      .setDefaultTypeRegistry(typeRegistry)
-                      .build())
-              .build();
-
-  private static final ApiMethodDescriptor<GetLocationRequest, Location>
-      getLocationMethodDescriptor =
-          ApiMethodDescriptor.<GetLocationRequest, Location>newBuilder()
-              .setFullMethodName("google.cloud.location.Locations/GetLocation")
-              .setHttpMethod("GET")
-              .setType(ApiMethodDescriptor.MethodType.UNARY)
-              .setRequestFormatter(
-                  ProtoMessageRequestFormatter.<GetLocationRequest>newBuilder()
-                      .setPath(
-                          "/v1beta1/{name=projects/*/locations/*}",
-                          request -> {
-                            Map<String, String> fields = new HashMap<>();
-                            ProtoRestSerializer<GetLocationRequest> serializer =
-                                ProtoRestSerializer.create();
-                            serializer.putPathParam(fields, "name", request.getName());
-                            return fields;
-                          })
-                      .setQueryParamsExtractor(
-                          request -> {
-                            Map<String, List<String>> fields = new HashMap<>();
-                            ProtoRestSerializer<GetLocationRequest> serializer =
-                                ProtoRestSerializer.create();
-                            return fields;
-                          })
-                      .setRequestBodyExtractor(request -> null)
-                      .build())
-              .setResponseParser(
-                  ProtoMessageResponseParser.<Location>newBuilder()
-                      .setDefaultInstance(Location.getDefaultInstance())
-                      .setDefaultTypeRegistry(typeRegistry)
-                      .build())
-              .build();
-
-  private final UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable;
-  private final UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable;
-  private final UnaryCallable<GetLocationRequest, Location> getLocationCallable;
-
-  private final BackgroundResource backgroundResources;
-  private final HttpJsonStubCallableFactory callableFactory;
-
-  public static final HttpJsonWickedStub create(WickedStubSettings settings) throws IOException {
-    return new HttpJsonWickedStub(settings, ClientContext.create(settings));
-  }
-
-  public static final HttpJsonWickedStub create(ClientContext clientContext) throws IOException {
-    return new HttpJsonWickedStub(WickedStubSettings.newHttpJsonBuilder().build(), clientContext);
-  }
-
-  public static final HttpJsonWickedStub create(
-      ClientContext clientContext, HttpJsonStubCallableFactory callableFactory) throws IOException {
-    return new HttpJsonWickedStub(
-        WickedStubSettings.newHttpJsonBuilder().build(), clientContext, callableFactory);
-  }
-
-  /**
-   * Constructs an instance of HttpJsonWickedStub, using the given settings. This is protected so
-   * that it is easy to make a subclass, but otherwise, the static factory methods should be
-   * preferred.
-   */
-  protected HttpJsonWickedStub(WickedStubSettings settings, ClientContext clientContext)
-      throws IOException {
-    this(settings, clientContext, new HttpJsonWickedCallableFactory());
-  }
-
-  /**
-   * Constructs an instance of HttpJsonWickedStub, using the given settings. This is protected so
-   * that it is easy to make a subclass, but otherwise, the static factory methods should be
-   * preferred.
-   */
-  protected HttpJsonWickedStub(
-      WickedStubSettings settings,
-      ClientContext clientContext,
-      HttpJsonStubCallableFactory callableFactory)
-      throws IOException {
-    this.callableFactory = callableFactory;
-
-    HttpJsonCallSettings<ListLocationsRequest, ListLocationsResponse>
-        listLocationsTransportSettings =
-            HttpJsonCallSettings.<ListLocationsRequest, ListLocationsResponse>newBuilder()
-                .setMethodDescriptor(listLocationsMethodDescriptor)
-                .setTypeRegistry(typeRegistry)
-                .build();
-    HttpJsonCallSettings<GetLocationRequest, Location> getLocationTransportSettings =
-        HttpJsonCallSettings.<GetLocationRequest, Location>newBuilder()
-            .setMethodDescriptor(getLocationMethodDescriptor)
-            .setTypeRegistry(typeRegistry)
-            .build();
-
-    this.listLocationsCallable =
-        callableFactory.createUnaryCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.listLocationsPagedCallable =
-        callableFactory.createPagedCallable(
-            listLocationsTransportSettings, settings.listLocationsSettings(), clientContext);
-    this.getLocationCallable =
-        callableFactory.createUnaryCallable(
-            getLocationTransportSettings, settings.getLocationSettings(), clientContext);
-
-    this.backgroundResources =
-        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
-  }
-
-  @InternalApi
-  public static List<ApiMethodDescriptor> getMethodDescriptors() {
-    List<ApiMethodDescriptor> methodDescriptors = new ArrayList<>();
-    methodDescriptors.add(listLocationsMethodDescriptor);
-    methodDescriptors.add(getLocationMethodDescriptor);
-    return methodDescriptors;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    return listLocationsCallable;
-  }
-
-  @Override
-  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    return listLocationsPagedCallable;
-  }
-
-  @Override
-  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
-    return getLocationCallable;
-  }
-
-  @Override
-  public UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
-    throw new UnsupportedOperationException(
-        "Not implemented: craftEvilPlanCallable(). REST transport is not implemented for this method yet.");
-  }
-
-  @Override
-  public BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
-    throw new UnsupportedOperationException(
-        "Not implemented: brainstormEvilPlansCallable(). REST transport is not implemented for this method yet.");
-  }
-
-  @Override
-  public ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
-    throw new UnsupportedOperationException(
-        "Not implemented: persuadeEvilPlanCallable(). REST transport is not implemented for this method yet.");
-  }
-
-  @Override
-  public final void close() {
-    try {
-      backgroundResources.close();
-    } catch (RuntimeException e) {
-      throw e;
-    } catch (Exception e) {
-      throw new IllegalStateException("Failed to close resource", e);
-    }
-  }
-
-  @Override
-  public void shutdown() {
-    backgroundResources.shutdown();
-  }
-
-  @Override
-  public boolean isShutdown() {
-    return backgroundResources.isShutdown();
-  }
-
-  @Override
-  public boolean isTerminated() {
-    return backgroundResources.isTerminated();
-  }
-
-  @Override
-  public void shutdownNow() {
-    backgroundResources.shutdownNow();
-  }
-
-  @Override
-  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
-    return backgroundResources.awaitTermination(duration, unit);
-  }
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
deleted file mode 100644
index 0693ab1315..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStub.java
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.BackgroundResource;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Base stub class for the Wicked service API.
- *
- * <p>This class is for advanced usage and reflects the underlying API directly.
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public abstract class WickedStub implements BackgroundResource {
-
-  public UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
-    throw new UnsupportedOperationException("Not implemented: craftEvilPlanCallable()");
-  }
-
-  public BidiStreamingCallable<EvilRequest, EvilResponse> brainstormEvilPlansCallable() {
-    throw new UnsupportedOperationException("Not implemented: brainstormEvilPlansCallable()");
-  }
-
-  public ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
-    throw new UnsupportedOperationException("Not implemented: persuadeEvilPlanCallable()");
-  }
-
-  public UnaryCallable<ListLocationsRequest, ListLocationsPagedResponse>
-      listLocationsPagedCallable() {
-    throw new UnsupportedOperationException("Not implemented: listLocationsPagedCallable()");
-  }
-
-  public UnaryCallable<ListLocationsRequest, ListLocationsResponse> listLocationsCallable() {
-    throw new UnsupportedOperationException("Not implemented: listLocationsCallable()");
-  }
-
-  public UnaryCallable<GetLocationRequest, Location> getLocationCallable() {
-    throw new UnsupportedOperationException("Not implemented: getLocationCallable()");
-  }
-
-  @Override
-  public abstract void close();
-}
diff --git a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java b/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
deleted file mode 100644
index dfb54a1ad3..0000000000
--- a/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/WickedStubSettings.java
+++ /dev/null
@@ -1,458 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1.stub;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.core.ApiFunction;
-import com.google.api.core.ApiFuture;
-import com.google.api.core.BetaApi;
-import com.google.api.gax.core.GaxProperties;
-import com.google.api.gax.core.GoogleCredentialsProvider;
-import com.google.api.gax.core.InstantiatingExecutorProvider;
-import com.google.api.gax.grpc.GaxGrpcProperties;
-import com.google.api.gax.grpc.GrpcTransportChannel;
-import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
-import com.google.api.gax.httpjson.GaxHttpJsonProperties;
-import com.google.api.gax.httpjson.HttpJsonTransportChannel;
-import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
-import com.google.api.gax.retrying.RetrySettings;
-import com.google.api.gax.rpc.ApiCallContext;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.PageContext;
-import com.google.api.gax.rpc.PagedCallSettings;
-import com.google.api.gax.rpc.PagedListDescriptor;
-import com.google.api.gax.rpc.PagedListResponseFactory;
-import com.google.api.gax.rpc.StatusCode;
-import com.google.api.gax.rpc.StreamingCallSettings;
-import com.google.api.gax.rpc.StubSettings;
-import com.google.api.gax.rpc.TransportChannelProvider;
-import com.google.api.gax.rpc.UnaryCallSettings;
-import com.google.api.gax.rpc.UnaryCallable;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Lists;
-import com.google.showcase.v1beta1.EvilRequest;
-import com.google.showcase.v1beta1.EvilResponse;
-import java.io.IOException;
-import java.util.List;
-import javax.annotation.Generated;
-
-// AUTO-GENERATED DOCUMENTATION AND CLASS.
-/**
- * Settings class to configure an instance of {@link WickedStub}.
- *
- * <p>The default instance has everything set to sensible defaults:
- *
- * <ul>
- *   <li>The default service address (localhost) and default port (7469) are used.
- *   <li>Credentials are acquired automatically through Application Default Credentials.
- *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
- * </ul>
- *
- * <p>The builder of this class is recursive, so contained classes are themselves builders. When
- * build() is called, the tree of builders is called to create the complete settings object.
- *
- * <p>For example, to set the total timeout of craftEvilPlan to 30 seconds:
- *
- * <pre>{@code
- * // This snippet has been automatically generated and should be regarded as a code template only.
- * // It will require modifications to work:
- * // - It may require correct/in-range values for request initialization.
- * // - It may require specifying regional endpoints when creating the service client as shown in
- * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * WickedStubSettings.Builder wickedSettingsBuilder = WickedStubSettings.newBuilder();
- * wickedSettingsBuilder
- *     .craftEvilPlanSettings()
- *     .setRetrySettings(
- *         wickedSettingsBuilder
- *             .craftEvilPlanSettings()
- *             .getRetrySettings()
- *             .toBuilder()
- *             .setTotalTimeout(Duration.ofSeconds(30))
- *             .build());
- * WickedStubSettings wickedSettings = wickedSettingsBuilder.build();
- * }</pre>
- */
-@BetaApi
-@Generated("by gapic-generator-java")
-public class WickedStubSettings extends StubSettings<WickedStubSettings> {
-  /** The default scopes of the service. */
-  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
-      ImmutableList.<String>builder().build();
-
-  private final UnaryCallSettings<EvilRequest, EvilResponse> craftEvilPlanSettings;
-  private final StreamingCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansSettings;
-  private final StreamingCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanSettings;
-  private final PagedCallSettings<
-          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      listLocationsSettings;
-  private final UnaryCallSettings<GetLocationRequest, Location> getLocationSettings;
-
-  private static final PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>
-      LIST_LOCATIONS_PAGE_STR_DESC =
-          new PagedListDescriptor<ListLocationsRequest, ListLocationsResponse, Location>() {
-            @Override
-            public String emptyToken() {
-              return "";
-            }
-
-            @Override
-            public ListLocationsRequest injectToken(ListLocationsRequest payload, String token) {
-              return ListLocationsRequest.newBuilder(payload).setPageToken(token).build();
-            }
-
-            @Override
-            public ListLocationsRequest injectPageSize(ListLocationsRequest payload, int pageSize) {
-              return ListLocationsRequest.newBuilder(payload).setPageSize(pageSize).build();
-            }
-
-            @Override
-            public Integer extractPageSize(ListLocationsRequest payload) {
-              return payload.getPageSize();
-            }
-
-            @Override
-            public String extractNextToken(ListLocationsResponse payload) {
-              return payload.getNextPageToken();
-            }
-
-            @Override
-            public Iterable<Location> extractResources(ListLocationsResponse payload) {
-              return payload.getLocationsList() == null
-                  ? ImmutableList.<Location>of()
-                  : payload.getLocationsList();
-            }
-          };
-
-  private static final PagedListResponseFactory<
-          ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      LIST_LOCATIONS_PAGE_STR_FACT =
-          new PagedListResponseFactory<
-              ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>() {
-            @Override
-            public ApiFuture<ListLocationsPagedResponse> getFuturePagedResponse(
-                UnaryCallable<ListLocationsRequest, ListLocationsResponse> callable,
-                ListLocationsRequest request,
-                ApiCallContext context,
-                ApiFuture<ListLocationsResponse> futureResponse) {
-              PageContext<ListLocationsRequest, ListLocationsResponse, Location> pageContext =
-                  PageContext.create(callable, LIST_LOCATIONS_PAGE_STR_DESC, request, context);
-              return ListLocationsPagedResponse.createAsync(pageContext, futureResponse);
-            }
-          };
-
-  /** Returns the object with the settings used for calls to craftEvilPlan. */
-  public UnaryCallSettings<EvilRequest, EvilResponse> craftEvilPlanSettings() {
-    return craftEvilPlanSettings;
-  }
-
-  /** Returns the object with the settings used for calls to brainstormEvilPlans. */
-  public StreamingCallSettings<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
-    return brainstormEvilPlansSettings;
-  }
-
-  /** Returns the object with the settings used for calls to persuadeEvilPlan. */
-  public StreamingCallSettings<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
-    return persuadeEvilPlanSettings;
-  }
-
-  /** Returns the object with the settings used for calls to listLocations. */
-  public PagedCallSettings<ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-      listLocationsSettings() {
-    return listLocationsSettings;
-  }
-
-  /** Returns the object with the settings used for calls to getLocation. */
-  public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
-    return getLocationSettings;
-  }
-
-  public WickedStub createStub() throws IOException {
-    if (getTransportChannelProvider()
-        .getTransportName()
-        .equals(GrpcTransportChannel.getGrpcTransportName())) {
-      return GrpcWickedStub.create(this);
-    }
-    if (getTransportChannelProvider()
-        .getTransportName()
-        .equals(HttpJsonTransportChannel.getHttpJsonTransportName())) {
-      return HttpJsonWickedStub.create(this);
-    }
-    throw new UnsupportedOperationException(
-        String.format(
-            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
-  }
-
-  /** Returns a builder for the default ExecutorProvider for this service. */
-  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
-    return InstantiatingExecutorProvider.newBuilder();
-  }
-
-  /** Returns the default service endpoint. */
-  public static String getDefaultEndpoint() {
-    return "localhost:7469";
-  }
-
-  /** Returns the default mTLS service endpoint. */
-  public static String getDefaultMtlsEndpoint() {
-    return "localhost:7469";
-  }
-
-  /** Returns the default service scopes. */
-  public static List<String> getDefaultServiceScopes() {
-    return DEFAULT_SERVICE_SCOPES;
-  }
-
-  /** Returns a builder for the default credentials for this service. */
-  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
-    return GoogleCredentialsProvider.newBuilder()
-        .setScopesToApply(DEFAULT_SERVICE_SCOPES)
-        .setUseJwtAccessWithScope(true);
-  }
-
-  /** Returns a builder for the default gRPC ChannelProvider for this service. */
-  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
-    return InstantiatingGrpcChannelProvider.newBuilder()
-        .setMaxInboundMessageSize(Integer.MAX_VALUE);
-  }
-
-  /** Returns a builder for the default REST ChannelProvider for this service. */
-  @BetaApi
-  public static InstantiatingHttpJsonChannelProvider.Builder
-      defaultHttpJsonTransportProviderBuilder() {
-    return InstantiatingHttpJsonChannelProvider.newBuilder();
-  }
-
-  public static TransportChannelProvider defaultTransportChannelProvider() {
-    return defaultGrpcTransportProviderBuilder().build();
-  }
-
-  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultGrpcApiClientHeaderProviderBuilder() {
-    return ApiClientHeaderProvider.newBuilder()
-        .setGeneratedLibToken("gapic", GaxProperties.getLibraryVersion(WickedStubSettings.class))
-        .setTransportToken(
-            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
-  }
-
-  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultHttpJsonApiClientHeaderProviderBuilder() {
-    return ApiClientHeaderProvider.newBuilder()
-        .setGeneratedLibToken("gapic", GaxProperties.getLibraryVersion(WickedStubSettings.class))
-        .setTransportToken(
-            GaxHttpJsonProperties.getHttpJsonTokenName(),
-            GaxHttpJsonProperties.getHttpJsonVersion());
-  }
-
-  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
-    return WickedStubSettings.defaultGrpcApiClientHeaderProviderBuilder();
-  }
-
-  /** Returns a new gRPC builder for this class. */
-  public static Builder newBuilder() {
-    return Builder.createDefault();
-  }
-
-  /** Returns a new REST builder for this class. */
-  public static Builder newHttpJsonBuilder() {
-    return Builder.createHttpJsonDefault();
-  }
-
-  /** Returns a new builder for this class. */
-  public static Builder newBuilder(ClientContext clientContext) {
-    return new Builder(clientContext);
-  }
-
-  /** Returns a builder containing all the values of this settings class. */
-  public Builder toBuilder() {
-    return new Builder(this);
-  }
-
-  protected WickedStubSettings(Builder settingsBuilder) throws IOException {
-    super(settingsBuilder);
-
-    craftEvilPlanSettings = settingsBuilder.craftEvilPlanSettings().build();
-    brainstormEvilPlansSettings = settingsBuilder.brainstormEvilPlansSettings().build();
-    persuadeEvilPlanSettings = settingsBuilder.persuadeEvilPlanSettings().build();
-    listLocationsSettings = settingsBuilder.listLocationsSettings().build();
-    getLocationSettings = settingsBuilder.getLocationSettings().build();
-  }
-
-  /** Builder for WickedStubSettings. */
-  public static class Builder extends StubSettings.Builder<WickedStubSettings, Builder> {
-    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
-    private final UnaryCallSettings.Builder<EvilRequest, EvilResponse> craftEvilPlanSettings;
-    private final StreamingCallSettings.Builder<EvilRequest, EvilResponse>
-        brainstormEvilPlansSettings;
-    private final StreamingCallSettings.Builder<EvilRequest, EvilResponse> persuadeEvilPlanSettings;
-    private final PagedCallSettings.Builder<
-            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-        listLocationsSettings;
-    private final UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings;
-    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
-        RETRYABLE_CODE_DEFINITIONS;
-
-    static {
-      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
-          ImmutableMap.builder();
-      definitions.put("no_retry_codes", ImmutableSet.copyOf(Lists.<StatusCode.Code>newArrayList()));
-      RETRYABLE_CODE_DEFINITIONS = definitions.build();
-    }
-
-    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
-
-    static {
-      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
-      RetrySettings settings = null;
-      settings = RetrySettings.newBuilder().setRpcTimeoutMultiplier(1.0).build();
-      definitions.put("no_retry_params", settings);
-      RETRY_PARAM_DEFINITIONS = definitions.build();
-    }
-
-    protected Builder() {
-      this(((ClientContext) null));
-    }
-
-    protected Builder(ClientContext clientContext) {
-      super(clientContext);
-
-      craftEvilPlanSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
-      brainstormEvilPlansSettings = StreamingCallSettings.newBuilder();
-      persuadeEvilPlanSettings = StreamingCallSettings.newBuilder();
-      listLocationsSettings = PagedCallSettings.newBuilder(LIST_LOCATIONS_PAGE_STR_FACT);
-      getLocationSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
-
-      unaryMethodSettingsBuilders =
-          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
-              craftEvilPlanSettings, listLocationsSettings, getLocationSettings);
-      initDefaults(this);
-    }
-
-    protected Builder(WickedStubSettings settings) {
-      super(settings);
-
-      craftEvilPlanSettings = settings.craftEvilPlanSettings.toBuilder();
-      brainstormEvilPlansSettings = settings.brainstormEvilPlansSettings.toBuilder();
-      persuadeEvilPlanSettings = settings.persuadeEvilPlanSettings.toBuilder();
-      listLocationsSettings = settings.listLocationsSettings.toBuilder();
-      getLocationSettings = settings.getLocationSettings.toBuilder();
-
-      unaryMethodSettingsBuilders =
-          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
-              craftEvilPlanSettings, listLocationsSettings, getLocationSettings);
-    }
-
-    private static Builder createDefault() {
-      Builder builder = new Builder(((ClientContext) null));
-
-      builder.setTransportChannelProvider(defaultTransportChannelProvider());
-      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
-      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
-      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
-      builder.setSwitchToMtlsEndpointAllowed(true);
-
-      return initDefaults(builder);
-    }
-
-    private static Builder createHttpJsonDefault() {
-      Builder builder = new Builder(((ClientContext) null));
-
-      builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
-      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
-      builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
-      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
-      builder.setSwitchToMtlsEndpointAllowed(true);
-
-      return initDefaults(builder);
-    }
-
-    private static Builder initDefaults(Builder builder) {
-      builder
-          .craftEvilPlanSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
-
-      builder
-          .listLocationsSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
-
-      builder
-          .getLocationSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
-
-      return builder;
-    }
-
-    /**
-     * Applies the given settings updater function to all of the unary API methods in this service.
-     *
-     * <p>Note: This method does not support applying settings to streaming methods.
-     */
-    public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
-      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
-      return this;
-    }
-
-    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
-      return unaryMethodSettingsBuilders;
-    }
-
-    /** Returns the builder for the settings used for calls to craftEvilPlan. */
-    public UnaryCallSettings.Builder<EvilRequest, EvilResponse> craftEvilPlanSettings() {
-      return craftEvilPlanSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to brainstormEvilPlans. */
-    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> brainstormEvilPlansSettings() {
-      return brainstormEvilPlansSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to persuadeEvilPlan. */
-    public StreamingCallSettings.Builder<EvilRequest, EvilResponse> persuadeEvilPlanSettings() {
-      return persuadeEvilPlanSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to listLocations. */
-    public PagedCallSettings.Builder<
-            ListLocationsRequest, ListLocationsResponse, ListLocationsPagedResponse>
-        listLocationsSettings() {
-      return listLocationsSettings;
-    }
-
-    /** Returns the builder for the settings used for calls to getLocation. */
-    public UnaryCallSettings.Builder<GetLocationRequest, Location> getLocationSettings() {
-      return getLocationSettings;
-    }
-
-    @Override
-    public WickedStubSettings build() throws IOException {
-      return new WickedStubSettings(this);
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
deleted file mode 100644
index 0aa72be007..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientHttpJsonTest.java
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.gax.core.NoCredentialsProvider;
-import com.google.api.gax.httpjson.GaxHttpJsonProperties;
-import com.google.api.gax.httpjson.testing.MockHttpService;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ApiException;
-import com.google.api.gax.rpc.ApiExceptionFactory;
-import com.google.api.gax.rpc.InvalidArgumentException;
-import com.google.api.gax.rpc.StatusCode;
-import com.google.api.gax.rpc.testing.FakeStatusCode;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.Lists;
-import com.google.protobuf.Any;
-import com.google.showcase.v1beta1.stub.HttpJsonCollisionsStub;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import javax.annotation.Generated;
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-
-@Generated("by gapic-generator-java")
-public class CollisionsClientHttpJsonTest {
-  private static MockHttpService mockService;
-  private static CollisionsClient client;
-
-  @BeforeClass
-  public static void startStaticServer() throws IOException {
-    mockService =
-        new MockHttpService(
-            HttpJsonCollisionsStub.getMethodDescriptors(), CollisionsSettings.getDefaultEndpoint());
-    CollisionsSettings settings =
-        CollisionsSettings.newHttpJsonBuilder()
-            .setTransportChannelProvider(
-                CollisionsSettings.defaultHttpJsonTransportProviderBuilder()
-                    .setHttpTransport(mockService)
-                    .build())
-            .setCredentialsProvider(NoCredentialsProvider.create())
-            .build();
-    client = CollisionsClient.create(settings);
-  }
-
-  @AfterClass
-  public static void stopServer() {
-    client.close();
-  }
-
-  @Before
-  public void setUp() {}
-
-  @After
-  public void tearDown() throws Exception {
-    mockService.reset();
-  }
-
-  @Test
-  public void doSomethingUnsupportedMethodTest() throws Exception {
-    // The doSomething() method is not supported in REST transport.
-    // This empty test is generated for technical reasons.
-  }
-
-  @Test
-  public void listLocationsTest() throws Exception {
-    Location responsesElement = Location.newBuilder().build();
-    ListLocationsResponse expectedResponse =
-        ListLocationsResponse.newBuilder()
-            .setNextPageToken("")
-            .addAllLocations(Arrays.asList(responsesElement))
-            .build();
-    mockService.addResponse(expectedResponse);
-
-    ListLocationsRequest request =
-        ListLocationsRequest.newBuilder()
-            .setName("projects/project-3664")
-            .setFilter("filter-1274492040")
-            .setPageSize(883849137)
-            .setPageToken("pageToken873572522")
-            .build();
-
-    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
-
-    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
-
-    Assert.assertEquals(1, resources.size());
-    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
-
-    List<String> actualRequests = mockService.getRequestPaths();
-    Assert.assertEquals(1, actualRequests.size());
-
-    String apiClientHeaderKey =
-        mockService
-            .getRequestHeaders()
-            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
-            .iterator()
-            .next();
-    Assert.assertTrue(
-        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
-            .matcher(apiClientHeaderKey)
-            .matches());
-  }
-
-  @Test
-  public void listLocationsExceptionTest() throws Exception {
-    ApiException exception =
-        ApiExceptionFactory.createException(
-            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
-    mockService.addException(exception);
-
-    try {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("projects/project-3664")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      client.listLocations(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-
-  @Test
-  public void getLocationTest() throws Exception {
-    Location expectedResponse =
-        Location.newBuilder()
-            .setName("name3373707")
-            .setLocationId("locationId1541836720")
-            .setDisplayName("displayName1714148973")
-            .putAllLabels(new HashMap<String, String>())
-            .setMetadata(Any.newBuilder().build())
-            .build();
-    mockService.addResponse(expectedResponse);
-
-    GetLocationRequest request =
-        GetLocationRequest.newBuilder()
-            .setName("projects/project-9062/locations/location-9062")
-            .build();
-
-    Location actualResponse = client.getLocation(request);
-    Assert.assertEquals(expectedResponse, actualResponse);
-
-    List<String> actualRequests = mockService.getRequestPaths();
-    Assert.assertEquals(1, actualRequests.size());
-
-    String apiClientHeaderKey =
-        mockService
-            .getRequestHeaders()
-            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
-            .iterator()
-            .next();
-    Assert.assertTrue(
-        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
-            .matcher(apiClientHeaderKey)
-            .matches());
-  }
-
-  @Test
-  public void getLocationExceptionTest() throws Exception {
-    ApiException exception =
-        ApiExceptionFactory.createException(
-            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
-    mockService.addException(exception);
-
-    try {
-      GetLocationRequest request =
-          GetLocationRequest.newBuilder()
-              .setName("projects/project-9062/locations/location-9062")
-              .build();
-      client.getLocation(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
deleted file mode 100644
index a1c6bf43d7..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/CollisionsClientTest.java
+++ /dev/null
@@ -1,248 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import static com.google.showcase.v1beta1.CollisionsClient.ListLocationsPagedResponse;
-
-import com.google.api.gax.core.NoCredentialsProvider;
-import com.google.api.gax.grpc.GaxGrpcProperties;
-import com.google.api.gax.grpc.testing.LocalChannelProvider;
-import com.google.api.gax.grpc.testing.MockGrpcService;
-import com.google.api.gax.grpc.testing.MockServiceHelper;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.InvalidArgumentException;
-import com.google.api.gax.rpc.StatusCode;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.Lists;
-import com.google.longrunning.Operation;
-import com.google.protobuf.AbstractMessage;
-import com.google.protobuf.Any;
-import io.grpc.StatusRuntimeException;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import java.util.UUID;
-import java.util.concurrent.ExecutionException;
-import javax.annotation.Generated;
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-
-@Generated("by gapic-generator-java")
-public class CollisionsClientTest {
-  private static MockCollisions mockCollisions;
-  private static MockLocations mockLocations;
-  private static MockServiceHelper mockServiceHelper;
-  private LocalChannelProvider channelProvider;
-  private CollisionsClient client;
-
-  @BeforeClass
-  public static void startStaticServer() {
-    mockCollisions = new MockCollisions();
-    mockLocations = new MockLocations();
-    mockServiceHelper =
-        new MockServiceHelper(
-            UUID.randomUUID().toString(),
-            Arrays.<MockGrpcService>asList(mockCollisions, mockLocations));
-    mockServiceHelper.start();
-  }
-
-  @AfterClass
-  public static void stopServer() {
-    mockServiceHelper.stop();
-  }
-
-  @Before
-  public void setUp() throws IOException {
-    mockServiceHelper.reset();
-    channelProvider = mockServiceHelper.createChannelProvider();
-    CollisionsSettings settings =
-        CollisionsSettings.newBuilder()
-            .setTransportChannelProvider(channelProvider)
-            .setCredentialsProvider(NoCredentialsProvider.create())
-            .build();
-    client = CollisionsClient.create(settings);
-  }
-
-  @After
-  public void tearDown() throws Exception {
-    client.close();
-  }
-
-  @Test
-  public void doSomethingTest() throws Exception {
-    Annotation expectedResponse = Annotation.newBuilder().setName("name3373707").build();
-    Operation resultOperation =
-        Operation.newBuilder()
-            .setName("doSomethingTest")
-            .setDone(true)
-            .setResponse(Any.pack(expectedResponse))
-            .build();
-    mockCollisions.addResponse(resultOperation);
-
-    Request request =
-        Request.newBuilder()
-            .setName("name3373707")
-            .setAnnotation(Annotation.newBuilder().build())
-            .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
-            .build();
-
-    Annotation actualResponse = client.doSomethingAsync(request).get();
-    Assert.assertEquals(expectedResponse, actualResponse);
-
-    List<AbstractMessage> actualRequests = mockCollisions.getRequests();
-    Assert.assertEquals(1, actualRequests.size());
-    Request actualRequest = ((Request) actualRequests.get(0));
-
-    Assert.assertEquals(request.getName(), actualRequest.getName());
-    Assert.assertEquals(request.getAnnotation(), actualRequest.getAnnotation());
-    Assert.assertEquals(request.getLocation(), actualRequest.getLocation());
-    Assert.assertTrue(
-        channelProvider.isHeaderSent(
-            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
-            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
-  }
-
-  @Test
-  public void doSomethingExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockCollisions.addException(exception);
-
-    try {
-      Request request =
-          Request.newBuilder()
-              .setName("name3373707")
-              .setAnnotation(Annotation.newBuilder().build())
-              .setLocation(com.google.showcase.v1beta1.Location.newBuilder().build())
-              .build();
-      client.doSomethingAsync(request).get();
-      Assert.fail("No exception raised");
-    } catch (ExecutionException e) {
-      Assert.assertEquals(InvalidArgumentException.class, e.getCause().getClass());
-      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
-      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
-    }
-  }
-
-  @Test
-  public void listLocationsTest() throws Exception {
-    Location responsesElement = Location.newBuilder().build();
-    ListLocationsResponse expectedResponse =
-        ListLocationsResponse.newBuilder()
-            .setNextPageToken("")
-            .addAllLocations(Arrays.asList(responsesElement))
-            .build();
-    mockLocations.addResponse(expectedResponse);
-
-    ListLocationsRequest request =
-        ListLocationsRequest.newBuilder()
-            .setName("name3373707")
-            .setFilter("filter-1274492040")
-            .setPageSize(883849137)
-            .setPageToken("pageToken873572522")
-            .build();
-
-    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
-
-    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
-
-    Assert.assertEquals(1, resources.size());
-    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
-
-    List<AbstractMessage> actualRequests = mockLocations.getRequests();
-    Assert.assertEquals(1, actualRequests.size());
-    ListLocationsRequest actualRequest = ((ListLocationsRequest) actualRequests.get(0));
-
-    Assert.assertEquals(request.getName(), actualRequest.getName());
-    Assert.assertEquals(request.getFilter(), actualRequest.getFilter());
-    Assert.assertEquals(request.getPageSize(), actualRequest.getPageSize());
-    Assert.assertEquals(request.getPageToken(), actualRequest.getPageToken());
-    Assert.assertTrue(
-        channelProvider.isHeaderSent(
-            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
-            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
-  }
-
-  @Test
-  public void listLocationsExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockLocations.addException(exception);
-
-    try {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      client.listLocations(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-
-  @Test
-  public void getLocationTest() throws Exception {
-    Location expectedResponse =
-        Location.newBuilder()
-            .setName("name3373707")
-            .setLocationId("locationId1541836720")
-            .setDisplayName("displayName1714148973")
-            .putAllLabels(new HashMap<String, String>())
-            .setMetadata(Any.newBuilder().build())
-            .build();
-    mockLocations.addResponse(expectedResponse);
-
-    GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-
-    Location actualResponse = client.getLocation(request);
-    Assert.assertEquals(expectedResponse, actualResponse);
-
-    List<AbstractMessage> actualRequests = mockLocations.getRequests();
-    Assert.assertEquals(1, actualRequests.size());
-    GetLocationRequest actualRequest = ((GetLocationRequest) actualRequests.get(0));
-
-    Assert.assertEquals(request.getName(), actualRequest.getName());
-    Assert.assertTrue(
-        channelProvider.isHeaderSent(
-            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
-            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
-  }
-
-  @Test
-  public void getLocationExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockLocations.addException(exception);
-
-    try {
-      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-      client.getLocation(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
deleted file mode 100644
index 580b7c4d51..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisions.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.grpc.testing.MockGrpcService;
-import com.google.protobuf.AbstractMessage;
-import io.grpc.ServerServiceDefinition;
-import java.util.List;
-import javax.annotation.Generated;
-
-@BetaApi
-@Generated("by gapic-generator-java")
-public class MockCollisions implements MockGrpcService {
-  private final MockCollisionsImpl serviceImpl;
-
-  public MockCollisions() {
-    serviceImpl = new MockCollisionsImpl();
-  }
-
-  @Override
-  public List<AbstractMessage> getRequests() {
-    return serviceImpl.getRequests();
-  }
-
-  @Override
-  public void addResponse(AbstractMessage response) {
-    serviceImpl.addResponse(response);
-  }
-
-  @Override
-  public void addException(Exception exception) {
-    serviceImpl.addException(exception);
-  }
-
-  @Override
-  public ServerServiceDefinition getServiceDefinition() {
-    return serviceImpl.bindService();
-  }
-
-  @Override
-  public void reset() {
-    serviceImpl.reset();
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
deleted file mode 100644
index ec284c97a7..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockCollisionsImpl.java
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import com.google.api.core.BetaApi;
-import com.google.longrunning.Operation;
-import com.google.protobuf.AbstractMessage;
-import com.google.showcase.v1beta1.CollisionsGrpc.CollisionsImplBase;
-import io.grpc.stub.StreamObserver;
-import java.util.ArrayList;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Queue;
-import javax.annotation.Generated;
-
-@BetaApi
-@Generated("by gapic-generator-java")
-public class MockCollisionsImpl extends CollisionsImplBase {
-  private List<AbstractMessage> requests;
-  private Queue<Object> responses;
-
-  public MockCollisionsImpl() {
-    requests = new ArrayList<>();
-    responses = new LinkedList<>();
-  }
-
-  public List<AbstractMessage> getRequests() {
-    return requests;
-  }
-
-  public void addResponse(AbstractMessage response) {
-    responses.add(response);
-  }
-
-  public void setResponses(List<AbstractMessage> responses) {
-    this.responses = new LinkedList<Object>(responses);
-  }
-
-  public void addException(Exception exception) {
-    responses.add(exception);
-  }
-
-  public void reset() {
-    requests = new ArrayList<>();
-    responses = new LinkedList<>();
-  }
-
-  @Override
-  public void doSomething(Request request, StreamObserver<Operation> responseObserver) {
-    Object response = responses.poll();
-    if (response instanceof Operation) {
-      requests.add(request);
-      responseObserver.onNext(((Operation) response));
-      responseObserver.onCompleted();
-    } else if (response instanceof Exception) {
-      responseObserver.onError(((Exception) response));
-    } else {
-      responseObserver.onError(
-          new IllegalArgumentException(
-              String.format(
-                  "Unrecognized response type %s for method doSomething, expected %s or %s",
-                  response == null ? "null" : response.getClass().getName(),
-                  Operation.class.getName(),
-                  Exception.class.getName())));
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
deleted file mode 100644
index 219dc25a91..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWicked.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import com.google.api.core.BetaApi;
-import com.google.api.gax.grpc.testing.MockGrpcService;
-import com.google.protobuf.AbstractMessage;
-import io.grpc.ServerServiceDefinition;
-import java.util.List;
-import javax.annotation.Generated;
-
-@BetaApi
-@Generated("by gapic-generator-java")
-public class MockWicked implements MockGrpcService {
-  private final MockWickedImpl serviceImpl;
-
-  public MockWicked() {
-    serviceImpl = new MockWickedImpl();
-  }
-
-  @Override
-  public List<AbstractMessage> getRequests() {
-    return serviceImpl.getRequests();
-  }
-
-  @Override
-  public void addResponse(AbstractMessage response) {
-    serviceImpl.addResponse(response);
-  }
-
-  @Override
-  public void addException(Exception exception) {
-    serviceImpl.addException(exception);
-  }
-
-  @Override
-  public ServerServiceDefinition getServiceDefinition() {
-    return serviceImpl.bindService();
-  }
-
-  @Override
-  public void reset() {
-    serviceImpl.reset();
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
deleted file mode 100644
index 0fdad0b607..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/MockWickedImpl.java
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import com.google.api.core.BetaApi;
-import com.google.protobuf.AbstractMessage;
-import com.google.showcase.v1beta1.WickedGrpc.WickedImplBase;
-import io.grpc.stub.StreamObserver;
-import java.util.ArrayList;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Queue;
-import javax.annotation.Generated;
-
-@BetaApi
-@Generated("by gapic-generator-java")
-public class MockWickedImpl extends WickedImplBase {
-  private List<AbstractMessage> requests;
-  private Queue<Object> responses;
-
-  public MockWickedImpl() {
-    requests = new ArrayList<>();
-    responses = new LinkedList<>();
-  }
-
-  public List<AbstractMessage> getRequests() {
-    return requests;
-  }
-
-  public void addResponse(AbstractMessage response) {
-    responses.add(response);
-  }
-
-  public void setResponses(List<AbstractMessage> responses) {
-    this.responses = new LinkedList<Object>(responses);
-  }
-
-  public void addException(Exception exception) {
-    responses.add(exception);
-  }
-
-  public void reset() {
-    requests = new ArrayList<>();
-    responses = new LinkedList<>();
-  }
-
-  @Override
-  public void craftEvilPlan(EvilRequest request, StreamObserver<EvilResponse> responseObserver) {
-    Object response = responses.poll();
-    if (response instanceof EvilResponse) {
-      requests.add(request);
-      responseObserver.onNext(((EvilResponse) response));
-      responseObserver.onCompleted();
-    } else if (response instanceof Exception) {
-      responseObserver.onError(((Exception) response));
-    } else {
-      responseObserver.onError(
-          new IllegalArgumentException(
-              String.format(
-                  "Unrecognized response type %s for method CraftEvilPlan, expected %s or %s",
-                  response == null ? "null" : response.getClass().getName(),
-                  EvilResponse.class.getName(),
-                  Exception.class.getName())));
-    }
-  }
-
-  @Override
-  public StreamObserver<EvilRequest> brainstormEvilPlans(
-      final StreamObserver<EvilResponse> responseObserver) {
-    StreamObserver<EvilRequest> requestObserver =
-        new StreamObserver<EvilRequest>() {
-          @Override
-          public void onNext(EvilRequest value) {
-            requests.add(value);
-            final Object response = responses.remove();
-            if (response instanceof EvilResponse) {
-              responseObserver.onNext(((EvilResponse) response));
-            } else if (response instanceof Exception) {
-              responseObserver.onError(((Exception) response));
-            } else {
-              responseObserver.onError(
-                  new IllegalArgumentException(
-                      String.format(
-                          "Unrecognized response type %s for method BrainstormEvilPlans, expected %s or %s",
-                          response == null ? "null" : response.getClass().getName(),
-                          EvilResponse.class.getName(),
-                          Exception.class.getName())));
-            }
-          }
-
-          @Override
-          public void onError(Throwable t) {
-            responseObserver.onError(t);
-          }
-
-          @Override
-          public void onCompleted() {
-            responseObserver.onCompleted();
-          }
-        };
-    return requestObserver;
-  }
-
-  @Override
-  public StreamObserver<EvilRequest> persuadeEvilPlan(
-      final StreamObserver<EvilResponse> responseObserver) {
-    StreamObserver<EvilRequest> requestObserver =
-        new StreamObserver<EvilRequest>() {
-          @Override
-          public void onNext(EvilRequest value) {
-            requests.add(value);
-            final Object response = responses.remove();
-            if (response instanceof EvilResponse) {
-              responseObserver.onNext(((EvilResponse) response));
-            } else if (response instanceof Exception) {
-              responseObserver.onError(((Exception) response));
-            } else {
-              responseObserver.onError(
-                  new IllegalArgumentException(
-                      String.format(
-                          "Unrecognized response type %s for method PersuadeEvilPlan, expected %s or %s",
-                          response == null ? "null" : response.getClass().getName(),
-                          EvilResponse.class.getName(),
-                          Exception.class.getName())));
-            }
-          }
-
-          @Override
-          public void onError(Throwable t) {
-            responseObserver.onError(t);
-          }
-
-          @Override
-          public void onCompleted() {
-            responseObserver.onCompleted();
-          }
-        };
-    return requestObserver;
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
deleted file mode 100644
index 9d3ca75149..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientHttpJsonTest.java
+++ /dev/null
@@ -1,216 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.gax.core.NoCredentialsProvider;
-import com.google.api.gax.httpjson.GaxHttpJsonProperties;
-import com.google.api.gax.httpjson.testing.MockHttpService;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ApiException;
-import com.google.api.gax.rpc.ApiExceptionFactory;
-import com.google.api.gax.rpc.InvalidArgumentException;
-import com.google.api.gax.rpc.StatusCode;
-import com.google.api.gax.rpc.testing.FakeStatusCode;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.Lists;
-import com.google.protobuf.Any;
-import com.google.showcase.v1beta1.stub.HttpJsonWickedStub;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import javax.annotation.Generated;
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-
-@Generated("by gapic-generator-java")
-public class WickedClientHttpJsonTest {
-  private static MockHttpService mockService;
-  private static WickedClient client;
-
-  @BeforeClass
-  public static void startStaticServer() throws IOException {
-    mockService =
-        new MockHttpService(
-            HttpJsonWickedStub.getMethodDescriptors(), WickedSettings.getDefaultEndpoint());
-    WickedSettings settings =
-        WickedSettings.newHttpJsonBuilder()
-            .setTransportChannelProvider(
-                WickedSettings.defaultHttpJsonTransportProviderBuilder()
-                    .setHttpTransport(mockService)
-                    .build())
-            .setCredentialsProvider(NoCredentialsProvider.create())
-            .build();
-    client = WickedClient.create(settings);
-  }
-
-  @AfterClass
-  public static void stopServer() {
-    client.close();
-  }
-
-  @Before
-  public void setUp() {}
-
-  @After
-  public void tearDown() throws Exception {
-    mockService.reset();
-  }
-
-  @Test
-  public void craftEvilPlanUnsupportedMethodTest() throws Exception {
-    // The craftEvilPlan() method is not supported in REST transport.
-    // This empty test is generated for technical reasons.
-  }
-
-  @Test
-  public void brainstormEvilPlansUnsupportedMethodTest() throws Exception {
-    // The brainstormEvilPlans() method is not supported in REST transport.
-    // This empty test is generated for technical reasons.
-  }
-
-  @Test
-  public void persuadeEvilPlanUnsupportedMethodTest() throws Exception {
-    // The persuadeEvilPlan() method is not supported in REST transport.
-    // This empty test is generated for technical reasons.
-  }
-
-  @Test
-  public void listLocationsTest() throws Exception {
-    Location responsesElement = Location.newBuilder().build();
-    ListLocationsResponse expectedResponse =
-        ListLocationsResponse.newBuilder()
-            .setNextPageToken("")
-            .addAllLocations(Arrays.asList(responsesElement))
-            .build();
-    mockService.addResponse(expectedResponse);
-
-    ListLocationsRequest request =
-        ListLocationsRequest.newBuilder()
-            .setName("projects/project-3664")
-            .setFilter("filter-1274492040")
-            .setPageSize(883849137)
-            .setPageToken("pageToken873572522")
-            .build();
-
-    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
-
-    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
-
-    Assert.assertEquals(1, resources.size());
-    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
-
-    List<String> actualRequests = mockService.getRequestPaths();
-    Assert.assertEquals(1, actualRequests.size());
-
-    String apiClientHeaderKey =
-        mockService
-            .getRequestHeaders()
-            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
-            .iterator()
-            .next();
-    Assert.assertTrue(
-        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
-            .matcher(apiClientHeaderKey)
-            .matches());
-  }
-
-  @Test
-  public void listLocationsExceptionTest() throws Exception {
-    ApiException exception =
-        ApiExceptionFactory.createException(
-            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
-    mockService.addException(exception);
-
-    try {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("projects/project-3664")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      client.listLocations(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-
-  @Test
-  public void getLocationTest() throws Exception {
-    Location expectedResponse =
-        Location.newBuilder()
-            .setName("name3373707")
-            .setLocationId("locationId1541836720")
-            .setDisplayName("displayName1714148973")
-            .putAllLabels(new HashMap<String, String>())
-            .setMetadata(Any.newBuilder().build())
-            .build();
-    mockService.addResponse(expectedResponse);
-
-    GetLocationRequest request =
-        GetLocationRequest.newBuilder()
-            .setName("projects/project-9062/locations/location-9062")
-            .build();
-
-    Location actualResponse = client.getLocation(request);
-    Assert.assertEquals(expectedResponse, actualResponse);
-
-    List<String> actualRequests = mockService.getRequestPaths();
-    Assert.assertEquals(1, actualRequests.size());
-
-    String apiClientHeaderKey =
-        mockService
-            .getRequestHeaders()
-            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
-            .iterator()
-            .next();
-    Assert.assertTrue(
-        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
-            .matcher(apiClientHeaderKey)
-            .matches());
-  }
-
-  @Test
-  public void getLocationExceptionTest() throws Exception {
-    ApiException exception =
-        ApiExceptionFactory.createException(
-            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
-    mockService.addException(exception);
-
-    try {
-      GetLocationRequest request =
-          GetLocationRequest.newBuilder()
-              .setName("projects/project-9062/locations/location-9062")
-              .build();
-      client.getLocation(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-}
diff --git a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java b/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
deleted file mode 100644
index 67bf9d3567..0000000000
--- a/showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/WickedClientTest.java
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * Copyright 2023 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.showcase.v1beta1;
-
-import static com.google.showcase.v1beta1.WickedClient.ListLocationsPagedResponse;
-
-import com.google.api.gax.core.NoCredentialsProvider;
-import com.google.api.gax.grpc.GaxGrpcProperties;
-import com.google.api.gax.grpc.testing.LocalChannelProvider;
-import com.google.api.gax.grpc.testing.MockGrpcService;
-import com.google.api.gax.grpc.testing.MockServiceHelper;
-import com.google.api.gax.grpc.testing.MockStreamObserver;
-import com.google.api.gax.rpc.ApiClientHeaderProvider;
-import com.google.api.gax.rpc.ApiStreamObserver;
-import com.google.api.gax.rpc.BidiStreamingCallable;
-import com.google.api.gax.rpc.ClientStreamingCallable;
-import com.google.api.gax.rpc.InvalidArgumentException;
-import com.google.api.gax.rpc.StatusCode;
-import com.google.cloud.location.GetLocationRequest;
-import com.google.cloud.location.ListLocationsRequest;
-import com.google.cloud.location.ListLocationsResponse;
-import com.google.cloud.location.Location;
-import com.google.common.collect.Lists;
-import com.google.protobuf.AbstractMessage;
-import com.google.protobuf.Any;
-import io.grpc.StatusRuntimeException;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import java.util.UUID;
-import java.util.concurrent.ExecutionException;
-import javax.annotation.Generated;
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-
-@Generated("by gapic-generator-java")
-public class WickedClientTest {
-  private static MockLocations mockLocations;
-  private static MockServiceHelper mockServiceHelper;
-  private static MockWicked mockWicked;
-  private LocalChannelProvider channelProvider;
-  private WickedClient client;
-
-  @BeforeClass
-  public static void startStaticServer() {
-    mockWicked = new MockWicked();
-    mockLocations = new MockLocations();
-    mockServiceHelper =
-        new MockServiceHelper(
-            UUID.randomUUID().toString(),
-            Arrays.<MockGrpcService>asList(mockWicked, mockLocations));
-    mockServiceHelper.start();
-  }
-
-  @AfterClass
-  public static void stopServer() {
-    mockServiceHelper.stop();
-  }
-
-  @Before
-  public void setUp() throws IOException {
-    mockServiceHelper.reset();
-    channelProvider = mockServiceHelper.createChannelProvider();
-    WickedSettings settings =
-        WickedSettings.newBuilder()
-            .setTransportChannelProvider(channelProvider)
-            .setCredentialsProvider(NoCredentialsProvider.create())
-            .build();
-    client = WickedClient.create(settings);
-  }
-
-  @After
-  public void tearDown() throws Exception {
-    client.close();
-  }
-
-  @Test
-  public void craftEvilPlanTest() throws Exception {
-    EvilResponse expectedResponse =
-        EvilResponse.newBuilder().setMaliciousPlan("maliciousPlan712757759").build();
-    mockWicked.addResponse(expectedResponse);
-
-    EvilRequest request =
-        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-
-    EvilResponse actualResponse = client.craftEvilPlan(request);
-    Assert.assertEquals(expectedResponse, actualResponse);
-
-    List<AbstractMessage> actualRequests = mockWicked.getRequests();
-    Assert.assertEquals(1, actualRequests.size());
-    EvilRequest actualRequest = ((EvilRequest) actualRequests.get(0));
-
-    Assert.assertEquals(request.getMaliciousIdea(), actualRequest.getMaliciousIdea());
-    Assert.assertTrue(
-        channelProvider.isHeaderSent(
-            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
-            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
-  }
-
-  @Test
-  public void craftEvilPlanExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockWicked.addException(exception);
-
-    try {
-      EvilRequest request =
-          EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-      client.craftEvilPlan(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-
-  @Test
-  public void brainstormEvilPlansTest() throws Exception {
-    EvilResponse expectedResponse =
-        EvilResponse.newBuilder().setMaliciousPlan("maliciousPlan712757759").build();
-    mockWicked.addResponse(expectedResponse);
-    EvilRequest request =
-        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-
-    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
-
-    BidiStreamingCallable<EvilRequest, EvilResponse> callable =
-        client.brainstormEvilPlansCallable();
-    ApiStreamObserver<EvilRequest> requestObserver = callable.bidiStreamingCall(responseObserver);
-
-    requestObserver.onNext(request);
-    requestObserver.onCompleted();
-
-    List<EvilResponse> actualResponses = responseObserver.future().get();
-    Assert.assertEquals(1, actualResponses.size());
-    Assert.assertEquals(expectedResponse, actualResponses.get(0));
-  }
-
-  @Test
-  public void brainstormEvilPlansExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockWicked.addException(exception);
-    EvilRequest request =
-        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-
-    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
-
-    BidiStreamingCallable<EvilRequest, EvilResponse> callable =
-        client.brainstormEvilPlansCallable();
-    ApiStreamObserver<EvilRequest> requestObserver = callable.bidiStreamingCall(responseObserver);
-
-    requestObserver.onNext(request);
-
-    try {
-      List<EvilResponse> actualResponses = responseObserver.future().get();
-      Assert.fail("No exception thrown");
-    } catch (ExecutionException e) {
-      Assert.assertTrue(e.getCause() instanceof InvalidArgumentException);
-      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
-      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
-    }
-  }
-
-  @Test
-  public void persuadeEvilPlanTest() throws Exception {
-    EvilResponse expectedResponse =
-        EvilResponse.newBuilder().setMaliciousPlan("maliciousPlan712757759").build();
-    mockWicked.addResponse(expectedResponse);
-    EvilRequest request =
-        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-
-    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
-
-    ClientStreamingCallable<EvilRequest, EvilResponse> callable = client.persuadeEvilPlanCallable();
-    ApiStreamObserver<EvilRequest> requestObserver = callable.clientStreamingCall(responseObserver);
-
-    requestObserver.onNext(request);
-    requestObserver.onCompleted();
-
-    List<EvilResponse> actualResponses = responseObserver.future().get();
-    Assert.assertEquals(1, actualResponses.size());
-    Assert.assertEquals(expectedResponse, actualResponses.get(0));
-  }
-
-  @Test
-  public void persuadeEvilPlanExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockWicked.addException(exception);
-    EvilRequest request =
-        EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-
-    MockStreamObserver<EvilResponse> responseObserver = new MockStreamObserver<>();
-
-    ClientStreamingCallable<EvilRequest, EvilResponse> callable = client.persuadeEvilPlanCallable();
-    ApiStreamObserver<EvilRequest> requestObserver = callable.clientStreamingCall(responseObserver);
-
-    requestObserver.onNext(request);
-
-    try {
-      List<EvilResponse> actualResponses = responseObserver.future().get();
-      Assert.fail("No exception thrown");
-    } catch (ExecutionException e) {
-      Assert.assertTrue(e.getCause() instanceof InvalidArgumentException);
-      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
-      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
-    }
-  }
-
-  @Test
-  public void listLocationsTest() throws Exception {
-    Location responsesElement = Location.newBuilder().build();
-    ListLocationsResponse expectedResponse =
-        ListLocationsResponse.newBuilder()
-            .setNextPageToken("")
-            .addAllLocations(Arrays.asList(responsesElement))
-            .build();
-    mockLocations.addResponse(expectedResponse);
-
-    ListLocationsRequest request =
-        ListLocationsRequest.newBuilder()
-            .setName("name3373707")
-            .setFilter("filter-1274492040")
-            .setPageSize(883849137)
-            .setPageToken("pageToken873572522")
-            .build();
-
-    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);
-
-    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());
-
-    Assert.assertEquals(1, resources.size());
-    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));
-
-    List<AbstractMessage> actualRequests = mockLocations.getRequests();
-    Assert.assertEquals(1, actualRequests.size());
-    ListLocationsRequest actualRequest = ((ListLocationsRequest) actualRequests.get(0));
-
-    Assert.assertEquals(request.getName(), actualRequest.getName());
-    Assert.assertEquals(request.getFilter(), actualRequest.getFilter());
-    Assert.assertEquals(request.getPageSize(), actualRequest.getPageSize());
-    Assert.assertEquals(request.getPageToken(), actualRequest.getPageToken());
-    Assert.assertTrue(
-        channelProvider.isHeaderSent(
-            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
-            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
-  }
-
-  @Test
-  public void listLocationsExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockLocations.addException(exception);
-
-    try {
-      ListLocationsRequest request =
-          ListLocationsRequest.newBuilder()
-              .setName("name3373707")
-              .setFilter("filter-1274492040")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      client.listLocations(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-
-  @Test
-  public void getLocationTest() throws Exception {
-    Location expectedResponse =
-        Location.newBuilder()
-            .setName("name3373707")
-            .setLocationId("locationId1541836720")
-            .setDisplayName("displayName1714148973")
-            .putAllLabels(new HashMap<String, String>())
-            .setMetadata(Any.newBuilder().build())
-            .build();
-    mockLocations.addResponse(expectedResponse);
-
-    GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-
-    Location actualResponse = client.getLocation(request);
-    Assert.assertEquals(expectedResponse, actualResponse);
-
-    List<AbstractMessage> actualRequests = mockLocations.getRequests();
-    Assert.assertEquals(1, actualRequests.size());
-    GetLocationRequest actualRequest = ((GetLocationRequest) actualRequests.get(0));
-
-    Assert.assertEquals(request.getName(), actualRequest.getName());
-    Assert.assertTrue(
-        channelProvider.isHeaderSent(
-            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
-            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
-  }
-
-  @Test
-  public void getLocationExceptionTest() throws Exception {
-    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
-    mockLocations.addException(exception);
-
-    try {
-      GetLocationRequest request = GetLocationRequest.newBuilder().setName("name3373707").build();
-      client.getLocation(request);
-      Assert.fail("No exception raised");
-    } catch (InvalidArgumentException e) {
-      // Expected exception.
-    }
-  }
-}
diff --git a/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java b/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java
deleted file mode 100644
index ad352a06e0..0000000000
--- a/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsGrpc.java
+++ /dev/null
@@ -1,293 +0,0 @@
-package com.google.showcase.v1beta1;
-
-import static io.grpc.MethodDescriptor.generateFullMethodName;
-
-/**
- */
-@javax.annotation.Generated(
-    value = "by gRPC proto compiler",
-    comments = "Source: showcase/gapic-showcase-extended/proto/collisions.proto")
-@io.grpc.stub.annotations.GrpcGenerated
-public final class CollisionsGrpc {
-
-  private CollisionsGrpc() {}
-
-  public static final String SERVICE_NAME = "google.showcase.v1beta1.Collisions";
-
-  // Static method descriptors that strictly reflect the proto.
-  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.Request,
-      com.google.longrunning.Operation> getDoSomethingMethod;
-
-  @io.grpc.stub.annotations.RpcMethod(
-      fullMethodName = SERVICE_NAME + '/' + "doSomething",
-      requestType = com.google.showcase.v1beta1.Request.class,
-      responseType = com.google.longrunning.Operation.class,
-      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
-  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.Request,
-      com.google.longrunning.Operation> getDoSomethingMethod() {
-    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.Request, com.google.longrunning.Operation> getDoSomethingMethod;
-    if ((getDoSomethingMethod = CollisionsGrpc.getDoSomethingMethod) == null) {
-      synchronized (CollisionsGrpc.class) {
-        if ((getDoSomethingMethod = CollisionsGrpc.getDoSomethingMethod) == null) {
-          CollisionsGrpc.getDoSomethingMethod = getDoSomethingMethod =
-              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.Request, com.google.longrunning.Operation>newBuilder()
-              .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
-              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "doSomething"))
-              .setSampledToLocalTracing(true)
-              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.Request.getDefaultInstance()))
-              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.longrunning.Operation.getDefaultInstance()))
-              .setSchemaDescriptor(new CollisionsMethodDescriptorSupplier("doSomething"))
-              .build();
-        }
-      }
-    }
-    return getDoSomethingMethod;
-  }
-
-  /**
-   * Creates a new async stub that supports all call types for the service
-   */
-  public static CollisionsStub newStub(io.grpc.Channel channel) {
-    io.grpc.stub.AbstractStub.StubFactory<CollisionsStub> factory =
-      new io.grpc.stub.AbstractStub.StubFactory<CollisionsStub>() {
-        @java.lang.Override
-        public CollisionsStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-          return new CollisionsStub(channel, callOptions);
-        }
-      };
-    return CollisionsStub.newStub(factory, channel);
-  }
-
-  /**
-   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
-   */
-  public static CollisionsBlockingStub newBlockingStub(
-      io.grpc.Channel channel) {
-    io.grpc.stub.AbstractStub.StubFactory<CollisionsBlockingStub> factory =
-      new io.grpc.stub.AbstractStub.StubFactory<CollisionsBlockingStub>() {
-        @java.lang.Override
-        public CollisionsBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-          return new CollisionsBlockingStub(channel, callOptions);
-        }
-      };
-    return CollisionsBlockingStub.newStub(factory, channel);
-  }
-
-  /**
-   * Creates a new ListenableFuture-style stub that supports unary calls on the service
-   */
-  public static CollisionsFutureStub newFutureStub(
-      io.grpc.Channel channel) {
-    io.grpc.stub.AbstractStub.StubFactory<CollisionsFutureStub> factory =
-      new io.grpc.stub.AbstractStub.StubFactory<CollisionsFutureStub>() {
-        @java.lang.Override
-        public CollisionsFutureStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-          return new CollisionsFutureStub(channel, callOptions);
-        }
-      };
-    return CollisionsFutureStub.newStub(factory, channel);
-  }
-
-  /**
-   */
-  public interface AsyncService {
-
-    /**
-     */
-    default void doSomething(com.google.showcase.v1beta1.Request request,
-        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
-      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(getDoSomethingMethod(), responseObserver);
-    }
-  }
-
-  /**
-   * Base class for the server implementation of the service Collisions.
-   */
-  public static abstract class CollisionsImplBase
-      implements io.grpc.BindableService, AsyncService {
-
-    @java.lang.Override public final io.grpc.ServerServiceDefinition bindService() {
-      return CollisionsGrpc.bindService(this);
-    }
-  }
-
-  /**
-   * A stub to allow clients to do asynchronous rpc calls to service Collisions.
-   */
-  public static final class CollisionsStub
-      extends io.grpc.stub.AbstractAsyncStub<CollisionsStub> {
-    private CollisionsStub(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      super(channel, callOptions);
-    }
-
-    @java.lang.Override
-    protected CollisionsStub build(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      return new CollisionsStub(channel, callOptions);
-    }
-
-    /**
-     */
-    public void doSomething(com.google.showcase.v1beta1.Request request,
-        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
-      io.grpc.stub.ClientCalls.asyncUnaryCall(
-          getChannel().newCall(getDoSomethingMethod(), getCallOptions()), request, responseObserver);
-    }
-  }
-
-  /**
-   * A stub to allow clients to do synchronous rpc calls to service Collisions.
-   */
-  public static final class CollisionsBlockingStub
-      extends io.grpc.stub.AbstractBlockingStub<CollisionsBlockingStub> {
-    private CollisionsBlockingStub(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      super(channel, callOptions);
-    }
-
-    @java.lang.Override
-    protected CollisionsBlockingStub build(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      return new CollisionsBlockingStub(channel, callOptions);
-    }
-
-    /**
-     */
-    public com.google.longrunning.Operation doSomething(com.google.showcase.v1beta1.Request request) {
-      return io.grpc.stub.ClientCalls.blockingUnaryCall(
-          getChannel(), getDoSomethingMethod(), getCallOptions(), request);
-    }
-  }
-
-  /**
-   * A stub to allow clients to do ListenableFuture-style rpc calls to service Collisions.
-   */
-  public static final class CollisionsFutureStub
-      extends io.grpc.stub.AbstractFutureStub<CollisionsFutureStub> {
-    private CollisionsFutureStub(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      super(channel, callOptions);
-    }
-
-    @java.lang.Override
-    protected CollisionsFutureStub build(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      return new CollisionsFutureStub(channel, callOptions);
-    }
-
-    /**
-     */
-    public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation> doSomething(
-        com.google.showcase.v1beta1.Request request) {
-      return io.grpc.stub.ClientCalls.futureUnaryCall(
-          getChannel().newCall(getDoSomethingMethod(), getCallOptions()), request);
-    }
-  }
-
-  private static final int METHODID_DO_SOMETHING = 0;
-
-  private static final class MethodHandlers<Req, Resp> implements
-      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
-      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
-      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
-      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
-    private final AsyncService serviceImpl;
-    private final int methodId;
-
-    MethodHandlers(AsyncService serviceImpl, int methodId) {
-      this.serviceImpl = serviceImpl;
-      this.methodId = methodId;
-    }
-
-    @java.lang.Override
-    @java.lang.SuppressWarnings("unchecked")
-    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
-      switch (methodId) {
-        case METHODID_DO_SOMETHING:
-          serviceImpl.doSomething((com.google.showcase.v1beta1.Request) request,
-              (io.grpc.stub.StreamObserver<com.google.longrunning.Operation>) responseObserver);
-          break;
-        default:
-          throw new AssertionError();
-      }
-    }
-
-    @java.lang.Override
-    @java.lang.SuppressWarnings("unchecked")
-    public io.grpc.stub.StreamObserver<Req> invoke(
-        io.grpc.stub.StreamObserver<Resp> responseObserver) {
-      switch (methodId) {
-        default:
-          throw new AssertionError();
-      }
-    }
-  }
-
-  public static final io.grpc.ServerServiceDefinition bindService(AsyncService service) {
-    return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
-        .addMethod(
-          getDoSomethingMethod(),
-          io.grpc.stub.ServerCalls.asyncUnaryCall(
-            new MethodHandlers<
-              com.google.showcase.v1beta1.Request,
-              com.google.longrunning.Operation>(
-                service, METHODID_DO_SOMETHING)))
-        .build();
-  }
-
-  private static abstract class CollisionsBaseDescriptorSupplier
-      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
-    CollisionsBaseDescriptorSupplier() {}
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.getDescriptor();
-    }
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
-      return getFileDescriptor().findServiceByName("Collisions");
-    }
-  }
-
-  private static final class CollisionsFileDescriptorSupplier
-      extends CollisionsBaseDescriptorSupplier {
-    CollisionsFileDescriptorSupplier() {}
-  }
-
-  private static final class CollisionsMethodDescriptorSupplier
-      extends CollisionsBaseDescriptorSupplier
-      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
-    private final String methodName;
-
-    CollisionsMethodDescriptorSupplier(String methodName) {
-      this.methodName = methodName;
-    }
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
-      return getServiceDescriptor().findMethodByName(methodName);
-    }
-  }
-
-  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
-
-  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
-    io.grpc.ServiceDescriptor result = serviceDescriptor;
-    if (result == null) {
-      synchronized (CollisionsGrpc.class) {
-        result = serviceDescriptor;
-        if (result == null) {
-          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
-              .setSchemaDescriptor(new CollisionsFileDescriptorSupplier())
-              .addMethod(getDoSomethingMethod())
-              .build();
-        }
-      }
-    }
-    return result;
-  }
-}
diff --git a/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java b/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java
deleted file mode 100644
index babc778d11..0000000000
--- a/showcase/grpc-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedGrpc.java
+++ /dev/null
@@ -1,409 +0,0 @@
-package com.google.showcase.v1beta1;
-
-import static io.grpc.MethodDescriptor.generateFullMethodName;
-
-/**
- */
-@javax.annotation.Generated(
-    value = "by gRPC proto compiler",
-    comments = "Source: showcase/gapic-showcase-extended/proto/wicked.proto")
-@io.grpc.stub.annotations.GrpcGenerated
-public final class WickedGrpc {
-
-  private WickedGrpc() {}
-
-  public static final String SERVICE_NAME = "google.showcase.v1beta1.Wicked";
-
-  // Static method descriptors that strictly reflect the proto.
-  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
-      com.google.showcase.v1beta1.EvilResponse> getCraftEvilPlanMethod;
-
-  @io.grpc.stub.annotations.RpcMethod(
-      fullMethodName = SERVICE_NAME + '/' + "CraftEvilPlan",
-      requestType = com.google.showcase.v1beta1.EvilRequest.class,
-      responseType = com.google.showcase.v1beta1.EvilResponse.class,
-      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
-  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
-      com.google.showcase.v1beta1.EvilResponse> getCraftEvilPlanMethod() {
-    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse> getCraftEvilPlanMethod;
-    if ((getCraftEvilPlanMethod = WickedGrpc.getCraftEvilPlanMethod) == null) {
-      synchronized (WickedGrpc.class) {
-        if ((getCraftEvilPlanMethod = WickedGrpc.getCraftEvilPlanMethod) == null) {
-          WickedGrpc.getCraftEvilPlanMethod = getCraftEvilPlanMethod =
-              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse>newBuilder()
-              .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
-              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "CraftEvilPlan"))
-              .setSampledToLocalTracing(true)
-              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()))
-              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()))
-              .setSchemaDescriptor(new WickedMethodDescriptorSupplier("CraftEvilPlan"))
-              .build();
-        }
-      }
-    }
-    return getCraftEvilPlanMethod;
-  }
-
-  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
-      com.google.showcase.v1beta1.EvilResponse> getBrainstormEvilPlansMethod;
-
-  @io.grpc.stub.annotations.RpcMethod(
-      fullMethodName = SERVICE_NAME + '/' + "BrainstormEvilPlans",
-      requestType = com.google.showcase.v1beta1.EvilRequest.class,
-      responseType = com.google.showcase.v1beta1.EvilResponse.class,
-      methodType = io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
-  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
-      com.google.showcase.v1beta1.EvilResponse> getBrainstormEvilPlansMethod() {
-    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse> getBrainstormEvilPlansMethod;
-    if ((getBrainstormEvilPlansMethod = WickedGrpc.getBrainstormEvilPlansMethod) == null) {
-      synchronized (WickedGrpc.class) {
-        if ((getBrainstormEvilPlansMethod = WickedGrpc.getBrainstormEvilPlansMethod) == null) {
-          WickedGrpc.getBrainstormEvilPlansMethod = getBrainstormEvilPlansMethod =
-              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse>newBuilder()
-              .setType(io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
-              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "BrainstormEvilPlans"))
-              .setSampledToLocalTracing(true)
-              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()))
-              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()))
-              .setSchemaDescriptor(new WickedMethodDescriptorSupplier("BrainstormEvilPlans"))
-              .build();
-        }
-      }
-    }
-    return getBrainstormEvilPlansMethod;
-  }
-
-  private static volatile io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
-      com.google.showcase.v1beta1.EvilResponse> getPersuadeEvilPlanMethod;
-
-  @io.grpc.stub.annotations.RpcMethod(
-      fullMethodName = SERVICE_NAME + '/' + "PersuadeEvilPlan",
-      requestType = com.google.showcase.v1beta1.EvilRequest.class,
-      responseType = com.google.showcase.v1beta1.EvilResponse.class,
-      methodType = io.grpc.MethodDescriptor.MethodType.CLIENT_STREAMING)
-  public static io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest,
-      com.google.showcase.v1beta1.EvilResponse> getPersuadeEvilPlanMethod() {
-    io.grpc.MethodDescriptor<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse> getPersuadeEvilPlanMethod;
-    if ((getPersuadeEvilPlanMethod = WickedGrpc.getPersuadeEvilPlanMethod) == null) {
-      synchronized (WickedGrpc.class) {
-        if ((getPersuadeEvilPlanMethod = WickedGrpc.getPersuadeEvilPlanMethod) == null) {
-          WickedGrpc.getPersuadeEvilPlanMethod = getPersuadeEvilPlanMethod =
-              io.grpc.MethodDescriptor.<com.google.showcase.v1beta1.EvilRequest, com.google.showcase.v1beta1.EvilResponse>newBuilder()
-              .setType(io.grpc.MethodDescriptor.MethodType.CLIENT_STREAMING)
-              .setFullMethodName(generateFullMethodName(SERVICE_NAME, "PersuadeEvilPlan"))
-              .setSampledToLocalTracing(true)
-              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.EvilRequest.getDefaultInstance()))
-              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
-                  com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()))
-              .setSchemaDescriptor(new WickedMethodDescriptorSupplier("PersuadeEvilPlan"))
-              .build();
-        }
-      }
-    }
-    return getPersuadeEvilPlanMethod;
-  }
-
-  /**
-   * Creates a new async stub that supports all call types for the service
-   */
-  public static WickedStub newStub(io.grpc.Channel channel) {
-    io.grpc.stub.AbstractStub.StubFactory<WickedStub> factory =
-      new io.grpc.stub.AbstractStub.StubFactory<WickedStub>() {
-        @java.lang.Override
-        public WickedStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-          return new WickedStub(channel, callOptions);
-        }
-      };
-    return WickedStub.newStub(factory, channel);
-  }
-
-  /**
-   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
-   */
-  public static WickedBlockingStub newBlockingStub(
-      io.grpc.Channel channel) {
-    io.grpc.stub.AbstractStub.StubFactory<WickedBlockingStub> factory =
-      new io.grpc.stub.AbstractStub.StubFactory<WickedBlockingStub>() {
-        @java.lang.Override
-        public WickedBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-          return new WickedBlockingStub(channel, callOptions);
-        }
-      };
-    return WickedBlockingStub.newStub(factory, channel);
-  }
-
-  /**
-   * Creates a new ListenableFuture-style stub that supports unary calls on the service
-   */
-  public static WickedFutureStub newFutureStub(
-      io.grpc.Channel channel) {
-    io.grpc.stub.AbstractStub.StubFactory<WickedFutureStub> factory =
-      new io.grpc.stub.AbstractStub.StubFactory<WickedFutureStub>() {
-        @java.lang.Override
-        public WickedFutureStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-          return new WickedFutureStub(channel, callOptions);
-        }
-      };
-    return WickedFutureStub.newStub(factory, channel);
-  }
-
-  /**
-   */
-  public interface AsyncService {
-
-    /**
-     */
-    default void craftEvilPlan(com.google.showcase.v1beta1.EvilRequest request,
-        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
-      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(getCraftEvilPlanMethod(), responseObserver);
-    }
-
-    /**
-     */
-    default io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> brainstormEvilPlans(
-        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
-      return io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall(getBrainstormEvilPlansMethod(), responseObserver);
-    }
-
-    /**
-     */
-    default io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> persuadeEvilPlan(
-        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
-      return io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall(getPersuadeEvilPlanMethod(), responseObserver);
-    }
-  }
-
-  /**
-   * Base class for the server implementation of the service Wicked.
-   */
-  public static abstract class WickedImplBase
-      implements io.grpc.BindableService, AsyncService {
-
-    @java.lang.Override public final io.grpc.ServerServiceDefinition bindService() {
-      return WickedGrpc.bindService(this);
-    }
-  }
-
-  /**
-   * A stub to allow clients to do asynchronous rpc calls to service Wicked.
-   */
-  public static final class WickedStub
-      extends io.grpc.stub.AbstractAsyncStub<WickedStub> {
-    private WickedStub(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      super(channel, callOptions);
-    }
-
-    @java.lang.Override
-    protected WickedStub build(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      return new WickedStub(channel, callOptions);
-    }
-
-    /**
-     */
-    public void craftEvilPlan(com.google.showcase.v1beta1.EvilRequest request,
-        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
-      io.grpc.stub.ClientCalls.asyncUnaryCall(
-          getChannel().newCall(getCraftEvilPlanMethod(), getCallOptions()), request, responseObserver);
-    }
-
-    /**
-     */
-    public io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> brainstormEvilPlans(
-        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
-      return io.grpc.stub.ClientCalls.asyncBidiStreamingCall(
-          getChannel().newCall(getBrainstormEvilPlansMethod(), getCallOptions()), responseObserver);
-    }
-
-    /**
-     */
-    public io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilRequest> persuadeEvilPlan(
-        io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse> responseObserver) {
-      return io.grpc.stub.ClientCalls.asyncClientStreamingCall(
-          getChannel().newCall(getPersuadeEvilPlanMethod(), getCallOptions()), responseObserver);
-    }
-  }
-
-  /**
-   * A stub to allow clients to do synchronous rpc calls to service Wicked.
-   */
-  public static final class WickedBlockingStub
-      extends io.grpc.stub.AbstractBlockingStub<WickedBlockingStub> {
-    private WickedBlockingStub(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      super(channel, callOptions);
-    }
-
-    @java.lang.Override
-    protected WickedBlockingStub build(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      return new WickedBlockingStub(channel, callOptions);
-    }
-
-    /**
-     */
-    public com.google.showcase.v1beta1.EvilResponse craftEvilPlan(com.google.showcase.v1beta1.EvilRequest request) {
-      return io.grpc.stub.ClientCalls.blockingUnaryCall(
-          getChannel(), getCraftEvilPlanMethod(), getCallOptions(), request);
-    }
-  }
-
-  /**
-   * A stub to allow clients to do ListenableFuture-style rpc calls to service Wicked.
-   */
-  public static final class WickedFutureStub
-      extends io.grpc.stub.AbstractFutureStub<WickedFutureStub> {
-    private WickedFutureStub(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      super(channel, callOptions);
-    }
-
-    @java.lang.Override
-    protected WickedFutureStub build(
-        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
-      return new WickedFutureStub(channel, callOptions);
-    }
-
-    /**
-     */
-    public com.google.common.util.concurrent.ListenableFuture<com.google.showcase.v1beta1.EvilResponse> craftEvilPlan(
-        com.google.showcase.v1beta1.EvilRequest request) {
-      return io.grpc.stub.ClientCalls.futureUnaryCall(
-          getChannel().newCall(getCraftEvilPlanMethod(), getCallOptions()), request);
-    }
-  }
-
-  private static final int METHODID_CRAFT_EVIL_PLAN = 0;
-  private static final int METHODID_BRAINSTORM_EVIL_PLANS = 1;
-  private static final int METHODID_PERSUADE_EVIL_PLAN = 2;
-
-  private static final class MethodHandlers<Req, Resp> implements
-      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
-      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
-      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
-      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
-    private final AsyncService serviceImpl;
-    private final int methodId;
-
-    MethodHandlers(AsyncService serviceImpl, int methodId) {
-      this.serviceImpl = serviceImpl;
-      this.methodId = methodId;
-    }
-
-    @java.lang.Override
-    @java.lang.SuppressWarnings("unchecked")
-    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
-      switch (methodId) {
-        case METHODID_CRAFT_EVIL_PLAN:
-          serviceImpl.craftEvilPlan((com.google.showcase.v1beta1.EvilRequest) request,
-              (io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse>) responseObserver);
-          break;
-        default:
-          throw new AssertionError();
-      }
-    }
-
-    @java.lang.Override
-    @java.lang.SuppressWarnings("unchecked")
-    public io.grpc.stub.StreamObserver<Req> invoke(
-        io.grpc.stub.StreamObserver<Resp> responseObserver) {
-      switch (methodId) {
-        case METHODID_BRAINSTORM_EVIL_PLANS:
-          return (io.grpc.stub.StreamObserver<Req>) serviceImpl.brainstormEvilPlans(
-              (io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse>) responseObserver);
-        case METHODID_PERSUADE_EVIL_PLAN:
-          return (io.grpc.stub.StreamObserver<Req>) serviceImpl.persuadeEvilPlan(
-              (io.grpc.stub.StreamObserver<com.google.showcase.v1beta1.EvilResponse>) responseObserver);
-        default:
-          throw new AssertionError();
-      }
-    }
-  }
-
-  public static final io.grpc.ServerServiceDefinition bindService(AsyncService service) {
-    return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
-        .addMethod(
-          getCraftEvilPlanMethod(),
-          io.grpc.stub.ServerCalls.asyncUnaryCall(
-            new MethodHandlers<
-              com.google.showcase.v1beta1.EvilRequest,
-              com.google.showcase.v1beta1.EvilResponse>(
-                service, METHODID_CRAFT_EVIL_PLAN)))
-        .addMethod(
-          getBrainstormEvilPlansMethod(),
-          io.grpc.stub.ServerCalls.asyncBidiStreamingCall(
-            new MethodHandlers<
-              com.google.showcase.v1beta1.EvilRequest,
-              com.google.showcase.v1beta1.EvilResponse>(
-                service, METHODID_BRAINSTORM_EVIL_PLANS)))
-        .addMethod(
-          getPersuadeEvilPlanMethod(),
-          io.grpc.stub.ServerCalls.asyncClientStreamingCall(
-            new MethodHandlers<
-              com.google.showcase.v1beta1.EvilRequest,
-              com.google.showcase.v1beta1.EvilResponse>(
-                service, METHODID_PERSUADE_EVIL_PLAN)))
-        .build();
-  }
-
-  private static abstract class WickedBaseDescriptorSupplier
-      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
-    WickedBaseDescriptorSupplier() {}
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
-      return com.google.showcase.v1beta1.WickedOuterClass.getDescriptor();
-    }
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
-      return getFileDescriptor().findServiceByName("Wicked");
-    }
-  }
-
-  private static final class WickedFileDescriptorSupplier
-      extends WickedBaseDescriptorSupplier {
-    WickedFileDescriptorSupplier() {}
-  }
-
-  private static final class WickedMethodDescriptorSupplier
-      extends WickedBaseDescriptorSupplier
-      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
-    private final String methodName;
-
-    WickedMethodDescriptorSupplier(String methodName) {
-      this.methodName = methodName;
-    }
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
-      return getServiceDescriptor().findMethodByName(methodName);
-    }
-  }
-
-  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
-
-  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
-    io.grpc.ServiceDescriptor result = serviceDescriptor;
-    if (result == null) {
-      synchronized (WickedGrpc.class) {
-        result = serviceDescriptor;
-        if (result == null) {
-          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
-              .setSchemaDescriptor(new WickedFileDescriptorSupplier())
-              .addMethod(getCraftEvilPlanMethod())
-              .addMethod(getBrainstormEvilPlansMethod())
-              .addMethod(getPersuadeEvilPlanMethod())
-              .build();
-        }
-      }
-    }
-    return result;
-  }
-}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
deleted file mode 100644
index e36e50a459..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Annotation.java
+++ /dev/null
@@ -1,544 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/collisions.proto
-
-package com.google.showcase.v1beta1;
-
-/**
- * Protobuf type {@code google.showcase.v1beta1.Annotation}
- */
-public final class Annotation extends
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-    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.Annotation)
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-  private Annotation(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
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-  @java.lang.Override
-  public final com.google.protobuf.UnknownFieldSet
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-  }
-  public static final com.google.protobuf.Descriptors.Descriptor
-      getDescriptor() {
-    return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
-  }
-
-  @java.lang.Override
-  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
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-  /**
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-  public java.lang.String getName() {
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-      return b;
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-    }
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-  private byte memoizedIsInitialized = -1;
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-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
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-    memoizedIsInitialized = 1;
-    return true;
-  }
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-  @java.lang.Override
-  public void writeTo(com.google.protobuf.CodedOutputStream output)
-                      throws java.io.IOException {
-    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
-      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
-    }
-    getUnknownFields().writeTo(output);
-  }
-
-  @java.lang.Override
-  public int getSerializedSize() {
-    int size = memoizedSize;
-    if (size != -1) return size;
-
-    size = 0;
-    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
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-    size += getUnknownFields().getSerializedSize();
-    memoizedSize = size;
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-  @java.lang.Override
-  public boolean equals(final java.lang.Object obj) {
-    if (obj == this) {
-     return true;
-    }
-    if (!(obj instanceof com.google.showcase.v1beta1.Annotation)) {
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-    }
-    com.google.showcase.v1beta1.Annotation other = (com.google.showcase.v1beta1.Annotation) obj;
-
-    if (!getName()
-        .equals(other.getName())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
-    return true;
-  }
-
-  @java.lang.Override
-  public int hashCode() {
-    if (memoizedHashCode != 0) {
-      return memoizedHashCode;
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-    int hash = 41;
-    hash = (19 * hash) + getDescriptor().hashCode();
-    hash = (37 * hash) + NAME_FIELD_NUMBER;
-    hash = (53 * hash) + getName().hashCode();
-    hash = (29 * hash) + getUnknownFields().hashCode();
-    memoizedHashCode = hash;
-    return hash;
-  }
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-  public static com.google.showcase.v1beta1.Annotation parseFrom(
-      java.nio.ByteBuffer data)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static com.google.showcase.v1beta1.Annotation parseFrom(
-      java.nio.ByteBuffer data,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.Annotation parseFrom(
-      com.google.protobuf.ByteString data)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static com.google.showcase.v1beta1.Annotation parseFrom(
-      com.google.protobuf.ByteString data,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.Annotation parseFrom(byte[] data)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
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-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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-    return com.google.protobuf.GeneratedMessageV3
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-      throws java.io.IOException {
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-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
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-  public static com.google.showcase.v1beta1.Annotation parseFrom(
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-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseWithIOException(PARSER, input);
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-  public static com.google.showcase.v1beta1.Annotation parseFrom(
-      com.google.protobuf.CodedInputStream input,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseWithIOException(PARSER, input, extensionRegistry);
-  }
-
-  @java.lang.Override
-  public Builder newBuilderForType() { return newBuilder(); }
-  public static Builder newBuilder() {
-    return DEFAULT_INSTANCE.toBuilder();
-  }
-  public static Builder newBuilder(com.google.showcase.v1beta1.Annotation prototype) {
-    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
-  }
-  @java.lang.Override
-  public Builder toBuilder() {
-    return this == DEFAULT_INSTANCE
-        ? new Builder() : new Builder().mergeFrom(this);
-  }
-
-  @java.lang.Override
-  protected Builder newBuilderForType(
-      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-    Builder builder = new Builder(parent);
-    return builder;
-  }
-  /**
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-   */
-  public static final class Builder extends
-      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
-      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.Annotation)
-      com.google.showcase.v1beta1.AnnotationOrBuilder {
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-        getDescriptor() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
-    }
-
-    @java.lang.Override
-    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
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-    // Construct using com.google.showcase.v1beta1.Annotation.newBuilder()
-    private Builder() {
-
-    }
-
-    private Builder(
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-    }
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-      bitField0_ = 0;
-      name_ = "";
-      return this;
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-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.Descriptor
-        getDescriptorForType() {
-      return com.google.showcase.v1beta1.CollisionsOuterClass.internal_static_google_showcase_v1beta1_Annotation_descriptor;
-    }
-
-    @java.lang.Override
-    public com.google.showcase.v1beta1.Annotation getDefaultInstanceForType() {
-      return com.google.showcase.v1beta1.Annotation.getDefaultInstance();
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-
-    @java.lang.Override
-    public com.google.showcase.v1beta1.Annotation build() {
-      com.google.showcase.v1beta1.Annotation result = buildPartial();
-      if (!result.isInitialized()) {
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-      return result;
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-
-    @java.lang.Override
-    public com.google.showcase.v1beta1.Annotation buildPartial() {
-      com.google.showcase.v1beta1.Annotation result = new com.google.showcase.v1beta1.Annotation(this);
-      if (bitField0_ != 0) { buildPartial0(result); }
-      onBuilt();
-      return result;
-    }
-
-    private void buildPartial0(com.google.showcase.v1beta1.Annotation result) {
-      int from_bitField0_ = bitField0_;
-      if (((from_bitField0_ & 0x00000001) != 0)) {
-        result.name_ = name_;
-      }
-    }
-
-    @java.lang.Override
-    public Builder clone() {
-      return super.clone();
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-    @java.lang.Override
-    public Builder setField(
-        com.google.protobuf.Descriptors.FieldDescriptor field,
-        java.lang.Object value) {
-      return super.setField(field, value);
-    }
-    @java.lang.Override
-    public Builder clearField(
-        com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return super.clearField(field);
-    }
-    @java.lang.Override
-    public Builder clearOneof(
-        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return super.clearOneof(oneof);
-    }
-    @java.lang.Override
-    public Builder setRepeatedField(
-        com.google.protobuf.Descriptors.FieldDescriptor field,
-        int index, java.lang.Object value) {
-      return super.setRepeatedField(field, index, value);
-    }
-    @java.lang.Override
-    public Builder addRepeatedField(
-        com.google.protobuf.Descriptors.FieldDescriptor field,
-        java.lang.Object value) {
-      return super.addRepeatedField(field, value);
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-    @java.lang.Override
-    public Builder mergeFrom(com.google.protobuf.Message other) {
-      if (other instanceof com.google.showcase.v1beta1.Annotation) {
-        return mergeFrom((com.google.showcase.v1beta1.Annotation)other);
-      } else {
-        super.mergeFrom(other);
-        return this;
-      }
-    }
-
-    public Builder mergeFrom(com.google.showcase.v1beta1.Annotation other) {
-      if (other == com.google.showcase.v1beta1.Annotation.getDefaultInstance()) return this;
-      if (!other.getName().isEmpty()) {
-        name_ = other.name_;
-        bitField0_ |= 0x00000001;
-        onChanged();
-      }
-      this.mergeUnknownFields(other.getUnknownFields());
-      onChanged();
-      return this;
-    }
-
-    @java.lang.Override
-    public final boolean isInitialized() {
-      return true;
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-
-    @java.lang.Override
-    public Builder mergeFrom(
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-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws java.io.IOException {
-      if (extensionRegistry == null) {
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-      try {
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-        while (!done) {
-          int tag = input.readTag();
-          switch (tag) {
-            case 0:
-              done = true;
-              break;
-            case 10: {
-              name_ = input.readStringRequireUtf8();
-              bitField0_ |= 0x00000001;
-              break;
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-      java.lang.Object ref = name_;
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-        com.google.protobuf.ByteString bs =
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-        java.lang.String s = bs.toStringUtf8();
-        name_ = s;
-        return s;
-      } else {
-        return (java.lang.String) ref;
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-    /**
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-     * @return The bytes for name.
-     */
-    public com.google.protobuf.ByteString
-        getNameBytes() {
-      java.lang.Object ref = name_;
-      if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
-            com.google.protobuf.ByteString.copyFromUtf8(
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-        return b;
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-     * @return This builder for chaining.
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-    public Builder setName(
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-      if (value == null) { throw new NullPointerException(); }
-      name_ = value;
-      bitField0_ |= 0x00000001;
-      onChanged();
-      return this;
-    }
-    /**
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-     * @return This builder for chaining.
-     */
-    public Builder clearName() {
-      name_ = getDefaultInstance().getName();
-      bitField0_ = (bitField0_ & ~0x00000001);
-      onChanged();
-      return this;
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-    /**
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-     * @return This builder for chaining.
-     */
-    public Builder setNameBytes(
-        com.google.protobuf.ByteString value) {
-      if (value == null) { throw new NullPointerException(); }
-      checkByteStringIsUtf8(value);
-      name_ = value;
-      bitField0_ |= 0x00000001;
-      onChanged();
-      return this;
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-    @java.lang.Override
-    public final Builder setUnknownFields(
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-      return super.setUnknownFields(unknownFields);
-    }
-
-    @java.lang.Override
-    public final Builder mergeUnknownFields(
-        final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.mergeUnknownFields(unknownFields);
-    }
-
-
-    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Annotation)
-  }
-
-  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Annotation)
-  private static final com.google.showcase.v1beta1.Annotation DEFAULT_INSTANCE;
-  static {
-    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Annotation();
-  }
-
-  public static com.google.showcase.v1beta1.Annotation getDefaultInstance() {
-    return DEFAULT_INSTANCE;
-  }
-
-  private static final com.google.protobuf.Parser<Annotation>
-      PARSER = new com.google.protobuf.AbstractParser<Annotation>() {
-    @java.lang.Override
-    public Annotation parsePartialFrom(
-        com.google.protobuf.CodedInputStream input,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      Builder builder = newBuilder();
-      try {
-        builder.mergeFrom(input, extensionRegistry);
-      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-        throw e.setUnfinishedMessage(builder.buildPartial());
-      } catch (com.google.protobuf.UninitializedMessageException e) {
-        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
-      } catch (java.io.IOException e) {
-        throw new com.google.protobuf.InvalidProtocolBufferException(e)
-            .setUnfinishedMessage(builder.buildPartial());
-      }
-      return builder.buildPartial();
-    }
-  };
-
-  public static com.google.protobuf.Parser<Annotation> parser() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.protobuf.Parser<Annotation> getParserForType() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.showcase.v1beta1.Annotation getDefaultInstanceForType() {
-    return DEFAULT_INSTANCE;
-  }
-
-}
-
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java
deleted file mode 100644
index 6801f02095..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AnnotationOrBuilder.java
+++ /dev/null
@@ -1,21 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/collisions.proto
-
-package com.google.showcase.v1beta1;
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diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
deleted file mode 100644
index 326d872182..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/CollisionsOuterClass.java
+++ /dev/null
@@ -1,90 +0,0 @@
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-// source: showcase/gapic-showcase-extended/proto/collisions.proto
-
-package com.google.showcase.v1beta1;
-
-public final class CollisionsOuterClass {
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-      ".google.longrunning.Operation\"\031\312A\026\n\nAnno" +
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diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
deleted file mode 100644
index ed713fa0b7..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequest.java
+++ /dev/null
@@ -1,544 +0,0 @@
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-
-  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.EvilRequest)
-  private static final com.google.showcase.v1beta1.EvilRequest DEFAULT_INSTANCE;
-  static {
-    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.EvilRequest();
-  }
-
-  public static com.google.showcase.v1beta1.EvilRequest getDefaultInstance() {
-    return DEFAULT_INSTANCE;
-  }
-
-  private static final com.google.protobuf.Parser<EvilRequest>
-      PARSER = new com.google.protobuf.AbstractParser<EvilRequest>() {
-    @java.lang.Override
-    public EvilRequest parsePartialFrom(
-        com.google.protobuf.CodedInputStream input,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      Builder builder = newBuilder();
-      try {
-        builder.mergeFrom(input, extensionRegistry);
-      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-        throw e.setUnfinishedMessage(builder.buildPartial());
-      } catch (com.google.protobuf.UninitializedMessageException e) {
-        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
-      } catch (java.io.IOException e) {
-        throw new com.google.protobuf.InvalidProtocolBufferException(e)
-            .setUnfinishedMessage(builder.buildPartial());
-      }
-      return builder.buildPartial();
-    }
-  };
-
-  public static com.google.protobuf.Parser<EvilRequest> parser() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.protobuf.Parser<EvilRequest> getParserForType() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.showcase.v1beta1.EvilRequest getDefaultInstanceForType() {
-    return DEFAULT_INSTANCE;
-  }
-
-}
-
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java
deleted file mode 100644
index 3b9d11f981..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilRequestOrBuilder.java
+++ /dev/null
@@ -1,21 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/wicked.proto
-
-package com.google.showcase.v1beta1;
-
-public interface EvilRequestOrBuilder extends
-    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.EvilRequest)
-    com.google.protobuf.MessageOrBuilder {
-
-  /**
-   * <code>string malicious_idea = 1;</code>
-   * @return The maliciousIdea.
-   */
-  java.lang.String getMaliciousIdea();
-  /**
-   * <code>string malicious_idea = 1;</code>
-   * @return The bytes for maliciousIdea.
-   */
-  com.google.protobuf.ByteString
-      getMaliciousIdeaBytes();
-}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
deleted file mode 100644
index 96c096134f..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponse.java
+++ /dev/null
@@ -1,544 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/wicked.proto
-
-package com.google.showcase.v1beta1;
-
-/**
- * Protobuf type {@code google.showcase.v1beta1.EvilResponse}
- */
-public final class EvilResponse extends
-    com.google.protobuf.GeneratedMessageV3 implements
-    // @@protoc_insertion_point(message_implements:google.showcase.v1beta1.EvilResponse)
-    EvilResponseOrBuilder {
-private static final long serialVersionUID = 0L;
-  // Use EvilResponse.newBuilder() to construct.
-  private EvilResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
-    super(builder);
-  }
-  private EvilResponse() {
-    maliciousPlan_ = "";
-  }
-
-  @java.lang.Override
-  @SuppressWarnings({"unused"})
-  protected java.lang.Object newInstance(
-      UnusedPrivateParameter unused) {
-    return new EvilResponse();
-  }
-
-  @java.lang.Override
-  public final com.google.protobuf.UnknownFieldSet
-  getUnknownFields() {
-    return this.unknownFields;
-  }
-  public static final com.google.protobuf.Descriptors.Descriptor
-      getDescriptor() {
-    return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
-  }
-
-  @java.lang.Override
-  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-      internalGetFieldAccessorTable() {
-    return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable
-        .ensureFieldAccessorsInitialized(
-            com.google.showcase.v1beta1.EvilResponse.class, com.google.showcase.v1beta1.EvilResponse.Builder.class);
-  }
-
-  public static final int MALICIOUS_PLAN_FIELD_NUMBER = 1;
-  @SuppressWarnings("serial")
-  private volatile java.lang.Object maliciousPlan_ = "";
-  /**
-   * <code>string malicious_plan = 1;</code>
-   * @return The maliciousPlan.
-   */
-  @java.lang.Override
-  public java.lang.String getMaliciousPlan() {
-    java.lang.Object ref = maliciousPlan_;
-    if (ref instanceof java.lang.String) {
-      return (java.lang.String) ref;
-    } else {
-      com.google.protobuf.ByteString bs = 
-          (com.google.protobuf.ByteString) ref;
-      java.lang.String s = bs.toStringUtf8();
-      maliciousPlan_ = s;
-      return s;
-    }
-  }
-  /**
-   * <code>string malicious_plan = 1;</code>
-   * @return The bytes for maliciousPlan.
-   */
-  @java.lang.Override
-  public com.google.protobuf.ByteString
-      getMaliciousPlanBytes() {
-    java.lang.Object ref = maliciousPlan_;
-    if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
-          com.google.protobuf.ByteString.copyFromUtf8(
-              (java.lang.String) ref);
-      maliciousPlan_ = b;
-      return b;
-    } else {
-      return (com.google.protobuf.ByteString) ref;
-    }
-  }
-
-  private byte memoizedIsInitialized = -1;
-  @java.lang.Override
-  public final boolean isInitialized() {
-    byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
-
-    memoizedIsInitialized = 1;
-    return true;
-  }
-
-  @java.lang.Override
-  public void writeTo(com.google.protobuf.CodedOutputStream output)
-                      throws java.io.IOException {
-    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(maliciousPlan_)) {
-      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, maliciousPlan_);
-    }
-    getUnknownFields().writeTo(output);
-  }
-
-  @java.lang.Override
-  public int getSerializedSize() {
-    int size = memoizedSize;
-    if (size != -1) return size;
-
-    size = 0;
-    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(maliciousPlan_)) {
-      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, maliciousPlan_);
-    }
-    size += getUnknownFields().getSerializedSize();
-    memoizedSize = size;
-    return size;
-  }
-
-  @java.lang.Override
-  public boolean equals(final java.lang.Object obj) {
-    if (obj == this) {
-     return true;
-    }
-    if (!(obj instanceof com.google.showcase.v1beta1.EvilResponse)) {
-      return super.equals(obj);
-    }
-    com.google.showcase.v1beta1.EvilResponse other = (com.google.showcase.v1beta1.EvilResponse) obj;
-
-    if (!getMaliciousPlan()
-        .equals(other.getMaliciousPlan())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
-    return true;
-  }
-
-  @java.lang.Override
-  public int hashCode() {
-    if (memoizedHashCode != 0) {
-      return memoizedHashCode;
-    }
-    int hash = 41;
-    hash = (19 * hash) + getDescriptor().hashCode();
-    hash = (37 * hash) + MALICIOUS_PLAN_FIELD_NUMBER;
-    hash = (53 * hash) + getMaliciousPlan().hashCode();
-    hash = (29 * hash) + getUnknownFields().hashCode();
-    memoizedHashCode = hash;
-    return hash;
-  }
-
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      java.nio.ByteBuffer data)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      java.nio.ByteBuffer data,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      com.google.protobuf.ByteString data)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      com.google.protobuf.ByteString data,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(byte[] data)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      byte[] data,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws com.google.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(java.io.InputStream input)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseWithIOException(PARSER, input);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      java.io.InputStream input,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseWithIOException(PARSER, input, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseDelimitedFrom(java.io.InputStream input)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseDelimitedWithIOException(PARSER, input);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseDelimitedFrom(
-      java.io.InputStream input,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      com.google.protobuf.CodedInputStream input)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseWithIOException(PARSER, input);
-  }
-  public static com.google.showcase.v1beta1.EvilResponse parseFrom(
-      com.google.protobuf.CodedInputStream input,
-      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return com.google.protobuf.GeneratedMessageV3
-        .parseWithIOException(PARSER, input, extensionRegistry);
-  }
-
-  @java.lang.Override
-  public Builder newBuilderForType() { return newBuilder(); }
-  public static Builder newBuilder() {
-    return DEFAULT_INSTANCE.toBuilder();
-  }
-  public static Builder newBuilder(com.google.showcase.v1beta1.EvilResponse prototype) {
-    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
-  }
-  @java.lang.Override
-  public Builder toBuilder() {
-    return this == DEFAULT_INSTANCE
-        ? new Builder() : new Builder().mergeFrom(this);
-  }
-
-  @java.lang.Override
-  protected Builder newBuilderForType(
-      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-    Builder builder = new Builder(parent);
-    return builder;
-  }
-  /**
-   * Protobuf type {@code google.showcase.v1beta1.EvilResponse}
-   */
-  public static final class Builder extends
-      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
-      // @@protoc_insertion_point(builder_implements:google.showcase.v1beta1.EvilResponse)
-      com.google.showcase.v1beta1.EvilResponseOrBuilder {
-    public static final com.google.protobuf.Descriptors.Descriptor
-        getDescriptor() {
-      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
-    }
-
-    @java.lang.Override
-    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-        internalGetFieldAccessorTable() {
-      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable
-          .ensureFieldAccessorsInitialized(
-              com.google.showcase.v1beta1.EvilResponse.class, com.google.showcase.v1beta1.EvilResponse.Builder.class);
-    }
-
-    // Construct using com.google.showcase.v1beta1.EvilResponse.newBuilder()
-    private Builder() {
-
-    }
-
-    private Builder(
-        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-      super(parent);
-
-    }
-    @java.lang.Override
-    public Builder clear() {
-      super.clear();
-      bitField0_ = 0;
-      maliciousPlan_ = "";
-      return this;
-    }
-
-    @java.lang.Override
-    public com.google.protobuf.Descriptors.Descriptor
-        getDescriptorForType() {
-      return com.google.showcase.v1beta1.WickedOuterClass.internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
-    }
-
-    @java.lang.Override
-    public com.google.showcase.v1beta1.EvilResponse getDefaultInstanceForType() {
-      return com.google.showcase.v1beta1.EvilResponse.getDefaultInstance();
-    }
-
-    @java.lang.Override
-    public com.google.showcase.v1beta1.EvilResponse build() {
-      com.google.showcase.v1beta1.EvilResponse result = buildPartial();
-      if (!result.isInitialized()) {
-        throw newUninitializedMessageException(result);
-      }
-      return result;
-    }
-
-    @java.lang.Override
-    public com.google.showcase.v1beta1.EvilResponse buildPartial() {
-      com.google.showcase.v1beta1.EvilResponse result = new com.google.showcase.v1beta1.EvilResponse(this);
-      if (bitField0_ != 0) { buildPartial0(result); }
-      onBuilt();
-      return result;
-    }
-
-    private void buildPartial0(com.google.showcase.v1beta1.EvilResponse result) {
-      int from_bitField0_ = bitField0_;
-      if (((from_bitField0_ & 0x00000001) != 0)) {
-        result.maliciousPlan_ = maliciousPlan_;
-      }
-    }
-
-    @java.lang.Override
-    public Builder clone() {
-      return super.clone();
-    }
-    @java.lang.Override
-    public Builder setField(
-        com.google.protobuf.Descriptors.FieldDescriptor field,
-        java.lang.Object value) {
-      return super.setField(field, value);
-    }
-    @java.lang.Override
-    public Builder clearField(
-        com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return super.clearField(field);
-    }
-    @java.lang.Override
-    public Builder clearOneof(
-        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return super.clearOneof(oneof);
-    }
-    @java.lang.Override
-    public Builder setRepeatedField(
-        com.google.protobuf.Descriptors.FieldDescriptor field,
-        int index, java.lang.Object value) {
-      return super.setRepeatedField(field, index, value);
-    }
-    @java.lang.Override
-    public Builder addRepeatedField(
-        com.google.protobuf.Descriptors.FieldDescriptor field,
-        java.lang.Object value) {
-      return super.addRepeatedField(field, value);
-    }
-    @java.lang.Override
-    public Builder mergeFrom(com.google.protobuf.Message other) {
-      if (other instanceof com.google.showcase.v1beta1.EvilResponse) {
-        return mergeFrom((com.google.showcase.v1beta1.EvilResponse)other);
-      } else {
-        super.mergeFrom(other);
-        return this;
-      }
-    }
-
-    public Builder mergeFrom(com.google.showcase.v1beta1.EvilResponse other) {
-      if (other == com.google.showcase.v1beta1.EvilResponse.getDefaultInstance()) return this;
-      if (!other.getMaliciousPlan().isEmpty()) {
-        maliciousPlan_ = other.maliciousPlan_;
-        bitField0_ |= 0x00000001;
-        onChanged();
-      }
-      this.mergeUnknownFields(other.getUnknownFields());
-      onChanged();
-      return this;
-    }
-
-    @java.lang.Override
-    public final boolean isInitialized() {
-      return true;
-    }
-
-    @java.lang.Override
-    public Builder mergeFrom(
-        com.google.protobuf.CodedInputStream input,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws java.io.IOException {
-      if (extensionRegistry == null) {
-        throw new java.lang.NullPointerException();
-      }
-      try {
-        boolean done = false;
-        while (!done) {
-          int tag = input.readTag();
-          switch (tag) {
-            case 0:
-              done = true;
-              break;
-            case 10: {
-              maliciousPlan_ = input.readStringRequireUtf8();
-              bitField0_ |= 0x00000001;
-              break;
-            } // case 10
-            default: {
-              if (!super.parseUnknownField(input, extensionRegistry, tag)) {
-                done = true; // was an endgroup tag
-              }
-              break;
-            } // default:
-          } // switch (tag)
-        } // while (!done)
-      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-        throw e.unwrapIOException();
-      } finally {
-        onChanged();
-      } // finally
-      return this;
-    }
-    private int bitField0_;
-
-    private java.lang.Object maliciousPlan_ = "";
-    /**
-     * <code>string malicious_plan = 1;</code>
-     * @return The maliciousPlan.
-     */
-    public java.lang.String getMaliciousPlan() {
-      java.lang.Object ref = maliciousPlan_;
-      if (!(ref instanceof java.lang.String)) {
-        com.google.protobuf.ByteString bs =
-            (com.google.protobuf.ByteString) ref;
-        java.lang.String s = bs.toStringUtf8();
-        maliciousPlan_ = s;
-        return s;
-      } else {
-        return (java.lang.String) ref;
-      }
-    }
-    /**
-     * <code>string malicious_plan = 1;</code>
-     * @return The bytes for maliciousPlan.
-     */
-    public com.google.protobuf.ByteString
-        getMaliciousPlanBytes() {
-      java.lang.Object ref = maliciousPlan_;
-      if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
-            com.google.protobuf.ByteString.copyFromUtf8(
-                (java.lang.String) ref);
-        maliciousPlan_ = b;
-        return b;
-      } else {
-        return (com.google.protobuf.ByteString) ref;
-      }
-    }
-    /**
-     * <code>string malicious_plan = 1;</code>
-     * @param value The maliciousPlan to set.
-     * @return This builder for chaining.
-     */
-    public Builder setMaliciousPlan(
-        java.lang.String value) {
-      if (value == null) { throw new NullPointerException(); }
-      maliciousPlan_ = value;
-      bitField0_ |= 0x00000001;
-      onChanged();
-      return this;
-    }
-    /**
-     * <code>string malicious_plan = 1;</code>
-     * @return This builder for chaining.
-     */
-    public Builder clearMaliciousPlan() {
-      maliciousPlan_ = getDefaultInstance().getMaliciousPlan();
-      bitField0_ = (bitField0_ & ~0x00000001);
-      onChanged();
-      return this;
-    }
-    /**
-     * <code>string malicious_plan = 1;</code>
-     * @param value The bytes for maliciousPlan to set.
-     * @return This builder for chaining.
-     */
-    public Builder setMaliciousPlanBytes(
-        com.google.protobuf.ByteString value) {
-      if (value == null) { throw new NullPointerException(); }
-      checkByteStringIsUtf8(value);
-      maliciousPlan_ = value;
-      bitField0_ |= 0x00000001;
-      onChanged();
-      return this;
-    }
-    @java.lang.Override
-    public final Builder setUnknownFields(
-        final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFields(unknownFields);
-    }
-
-    @java.lang.Override
-    public final Builder mergeUnknownFields(
-        final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.mergeUnknownFields(unknownFields);
-    }
-
-
-    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.EvilResponse)
-  }
-
-  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.EvilResponse)
-  private static final com.google.showcase.v1beta1.EvilResponse DEFAULT_INSTANCE;
-  static {
-    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.EvilResponse();
-  }
-
-  public static com.google.showcase.v1beta1.EvilResponse getDefaultInstance() {
-    return DEFAULT_INSTANCE;
-  }
-
-  private static final com.google.protobuf.Parser<EvilResponse>
-      PARSER = new com.google.protobuf.AbstractParser<EvilResponse>() {
-    @java.lang.Override
-    public EvilResponse parsePartialFrom(
-        com.google.protobuf.CodedInputStream input,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      Builder builder = newBuilder();
-      try {
-        builder.mergeFrom(input, extensionRegistry);
-      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-        throw e.setUnfinishedMessage(builder.buildPartial());
-      } catch (com.google.protobuf.UninitializedMessageException e) {
-        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
-      } catch (java.io.IOException e) {
-        throw new com.google.protobuf.InvalidProtocolBufferException(e)
-            .setUnfinishedMessage(builder.buildPartial());
-      }
-      return builder.buildPartial();
-    }
-  };
-
-  public static com.google.protobuf.Parser<EvilResponse> parser() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.protobuf.Parser<EvilResponse> getParserForType() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.showcase.v1beta1.EvilResponse getDefaultInstanceForType() {
-    return DEFAULT_INSTANCE;
-  }
-
-}
-
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java
deleted file mode 100644
index 4c78259881..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/EvilResponseOrBuilder.java
+++ /dev/null
@@ -1,21 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/wicked.proto
-
-package com.google.showcase.v1beta1;
-
-public interface EvilResponseOrBuilder extends
-    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.EvilResponse)
-    com.google.protobuf.MessageOrBuilder {
-
-  /**
-   * <code>string malicious_plan = 1;</code>
-   * @return The maliciousPlan.
-   */
-  java.lang.String getMaliciousPlan();
-  /**
-   * <code>string malicious_plan = 1;</code>
-   * @return The bytes for maliciousPlan.
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deleted file mode 100644
index 7e9c559fef..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Location.java
+++ /dev/null
@@ -1,544 +0,0 @@
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-  @java.lang.Override
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-    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
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-  @java.lang.Override
-  public Builder toBuilder() {
-    return this == DEFAULT_INSTANCE
-        ? new Builder() : new Builder().mergeFrom(this);
-  }
-
-  @java.lang.Override
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-
-    public Builder mergeFrom(com.google.showcase.v1beta1.Location other) {
-      if (other == com.google.showcase.v1beta1.Location.getDefaultInstance()) return this;
-      if (!other.getName().isEmpty()) {
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-      this.mergeUnknownFields(other.getUnknownFields());
-      onChanged();
-      return this;
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-    @java.lang.Override
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-    @java.lang.Override
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-        while (!done) {
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-
-    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Location)
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-        throw new com.google.protobuf.InvalidProtocolBufferException(e)
-            .setUnfinishedMessage(builder.buildPartial());
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-      return builder.buildPartial();
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-  public static com.google.protobuf.Parser<Location> parser() {
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diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
deleted file mode 100644
index 37f73be8aa..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/LocationOrBuilder.java
+++ /dev/null
@@ -1,21 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
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-
-package com.google.showcase.v1beta1;
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-public interface LocationOrBuilder extends
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diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
deleted file mode 100644
index 70ebe31042..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/Request.java
+++ /dev/null
@@ -1,906 +0,0 @@
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-      }
-      bitField0_ |= 0x00000004;
-      onChanged();
-      return this;
-    }
-    /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     */
-    public Builder mergeLocation(com.google.showcase.v1beta1.Location value) {
-      if (locationBuilder_ == null) {
-        if (((bitField0_ & 0x00000004) != 0) &&
-          location_ != null &&
-          location_ != com.google.showcase.v1beta1.Location.getDefaultInstance()) {
-          getLocationBuilder().mergeFrom(value);
-        } else {
-          location_ = value;
-        }
-      } else {
-        locationBuilder_.mergeFrom(value);
-      }
-      bitField0_ |= 0x00000004;
-      onChanged();
-      return this;
-    }
-    /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     */
-    public Builder clearLocation() {
-      bitField0_ = (bitField0_ & ~0x00000004);
-      location_ = null;
-      if (locationBuilder_ != null) {
-        locationBuilder_.dispose();
-        locationBuilder_ = null;
-      }
-      onChanged();
-      return this;
-    }
-    /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     */
-    public com.google.showcase.v1beta1.Location.Builder getLocationBuilder() {
-      bitField0_ |= 0x00000004;
-      onChanged();
-      return getLocationFieldBuilder().getBuilder();
-    }
-    /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     */
-    public com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder() {
-      if (locationBuilder_ != null) {
-        return locationBuilder_.getMessageOrBuilder();
-      } else {
-        return location_ == null ?
-            com.google.showcase.v1beta1.Location.getDefaultInstance() : location_;
-      }
-    }
-    /**
-     * <code>.google.showcase.v1beta1.Location location = 3;</code>
-     */
-    private com.google.protobuf.SingleFieldBuilderV3<
-        com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder> 
-        getLocationFieldBuilder() {
-      if (locationBuilder_ == null) {
-        locationBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
-            com.google.showcase.v1beta1.Location, com.google.showcase.v1beta1.Location.Builder, com.google.showcase.v1beta1.LocationOrBuilder>(
-                getLocation(),
-                getParentForChildren(),
-                isClean());
-        location_ = null;
-      }
-      return locationBuilder_;
-    }
-    @java.lang.Override
-    public final Builder setUnknownFields(
-        final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFields(unknownFields);
-    }
-
-    @java.lang.Override
-    public final Builder mergeUnknownFields(
-        final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.mergeUnknownFields(unknownFields);
-    }
-
-
-    // @@protoc_insertion_point(builder_scope:google.showcase.v1beta1.Request)
-  }
-
-  // @@protoc_insertion_point(class_scope:google.showcase.v1beta1.Request)
-  private static final com.google.showcase.v1beta1.Request DEFAULT_INSTANCE;
-  static {
-    DEFAULT_INSTANCE = new com.google.showcase.v1beta1.Request();
-  }
-
-  public static com.google.showcase.v1beta1.Request getDefaultInstance() {
-    return DEFAULT_INSTANCE;
-  }
-
-  private static final com.google.protobuf.Parser<Request>
-      PARSER = new com.google.protobuf.AbstractParser<Request>() {
-    @java.lang.Override
-    public Request parsePartialFrom(
-        com.google.protobuf.CodedInputStream input,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      Builder builder = newBuilder();
-      try {
-        builder.mergeFrom(input, extensionRegistry);
-      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-        throw e.setUnfinishedMessage(builder.buildPartial());
-      } catch (com.google.protobuf.UninitializedMessageException e) {
-        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
-      } catch (java.io.IOException e) {
-        throw new com.google.protobuf.InvalidProtocolBufferException(e)
-            .setUnfinishedMessage(builder.buildPartial());
-      }
-      return builder.buildPartial();
-    }
-  };
-
-  public static com.google.protobuf.Parser<Request> parser() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.protobuf.Parser<Request> getParserForType() {
-    return PARSER;
-  }
-
-  @java.lang.Override
-  public com.google.showcase.v1beta1.Request getDefaultInstanceForType() {
-    return DEFAULT_INSTANCE;
-  }
-
-}
-
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
deleted file mode 100644
index a8febedd64..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/RequestOrBuilder.java
+++ /dev/null
@@ -1,51 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/collisions.proto
-
-package com.google.showcase.v1beta1;
-
-public interface RequestOrBuilder extends
-    // @@protoc_insertion_point(interface_extends:google.showcase.v1beta1.Request)
-    com.google.protobuf.MessageOrBuilder {
-
-  /**
-   * <code>string name = 1;</code>
-   * @return The name.
-   */
-  java.lang.String getName();
-  /**
-   * <code>string name = 1;</code>
-   * @return The bytes for name.
-   */
-  com.google.protobuf.ByteString
-      getNameBytes();
-
-  /**
-   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
-   * @return Whether the annotation field is set.
-   */
-  boolean hasAnnotation();
-  /**
-   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
-   * @return The annotation.
-   */
-  com.google.showcase.v1beta1.Annotation getAnnotation();
-  /**
-   * <code>.google.showcase.v1beta1.Annotation annotation = 2;</code>
-   */
-  com.google.showcase.v1beta1.AnnotationOrBuilder getAnnotationOrBuilder();
-
-  /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   * @return Whether the location field is set.
-   */
-  boolean hasLocation();
-  /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   * @return The location.
-   */
-  com.google.showcase.v1beta1.Location getLocation();
-  /**
-   * <code>.google.showcase.v1beta1.Location location = 3;</code>
-   */
-  com.google.showcase.v1beta1.LocationOrBuilder getLocationOrBuilder();
-}
diff --git a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java b/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java
deleted file mode 100644
index 7498bd3edd..0000000000
--- a/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/WickedOuterClass.java
+++ /dev/null
@@ -1,79 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: showcase/gapic-showcase-extended/proto/wicked.proto
-
-package com.google.showcase.v1beta1;
-
-public final class WickedOuterClass {
-  private WickedOuterClass() {}
-  public static void registerAllExtensions(
-      com.google.protobuf.ExtensionRegistryLite registry) {
-  }
-
-  public static void registerAllExtensions(
-      com.google.protobuf.ExtensionRegistry registry) {
-    registerAllExtensions(
-        (com.google.protobuf.ExtensionRegistryLite) registry);
-  }
-  static final com.google.protobuf.Descriptors.Descriptor
-    internal_static_google_showcase_v1beta1_EvilRequest_descriptor;
-  static final 
-    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-      internal_static_google_showcase_v1beta1_EvilRequest_fieldAccessorTable;
-  static final com.google.protobuf.Descriptors.Descriptor
-    internal_static_google_showcase_v1beta1_EvilResponse_descriptor;
-  static final 
-    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-      internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable;
-
-  public static com.google.protobuf.Descriptors.FileDescriptor
-      getDescriptor() {
-    return descriptor;
-  }
-  private static  com.google.protobuf.Descriptors.FileDescriptor
-      descriptor;
-  static {
-    java.lang.String[] descriptorData = {
-      "\n3showcase/gapic-showcase-extended/proto" +
-      "/wicked.proto\022\027google.showcase.v1beta1\032\027" +
-      "google/api/client.proto\"%\n\013EvilRequest\022\026" +
-      "\n\016malicious_idea\030\001 \001(\t\"&\n\014EvilResponse\022\026" +
-      "\n\016malicious_plan\030\001 \001(\t2\304\002\n\006Wicked\022\\\n\rCra" +
-      "ftEvilPlan\022$.google.showcase.v1beta1.Evi" +
-      "lRequest\032%.google.showcase.v1beta1.EvilR" +
-      "esponse\022f\n\023BrainstormEvilPlans\022$.google." +
-      "showcase.v1beta1.EvilRequest\032%.google.sh" +
-      "owcase.v1beta1.EvilResponse(\0010\001\022a\n\020Persu" +
-      "adeEvilPlan\022$.google.showcase.v1beta1.Ev" +
-      "ilRequest\032%.google.showcase.v1beta1.Evil" +
-      "Response(\001\032\021\312A\016localhost:7469Bq\n\033com.goo" +
-      "gle.showcase.v1beta1P\001Z4github.com/googl" +
-      "eapis/gapic-showcase/server/genproto\352\002\031G" +
-      "oogle::Showcase::V1beta1b\006proto3"
-    };
-    descriptor = com.google.protobuf.Descriptors.FileDescriptor
-      .internalBuildGeneratedFileFrom(descriptorData,
-        new com.google.protobuf.Descriptors.FileDescriptor[] {
-          com.google.api.ClientProto.getDescriptor(),
-        });
-    internal_static_google_showcase_v1beta1_EvilRequest_descriptor =
-      getDescriptor().getMessageTypes().get(0);
-    internal_static_google_showcase_v1beta1_EvilRequest_fieldAccessorTable = new
-      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
-        internal_static_google_showcase_v1beta1_EvilRequest_descriptor,
-        new java.lang.String[] { "MaliciousIdea", });
-    internal_static_google_showcase_v1beta1_EvilResponse_descriptor =
-      getDescriptor().getMessageTypes().get(1);
-    internal_static_google_showcase_v1beta1_EvilResponse_fieldAccessorTable = new
-      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
-        internal_static_google_showcase_v1beta1_EvilResponse_descriptor,
-        new java.lang.String[] { "MaliciousPlan", });
-    com.google.protobuf.ExtensionRegistry registry =
-        com.google.protobuf.ExtensionRegistry.newInstance();
-    registry.add(com.google.api.ClientProto.defaultHost);
-    com.google.protobuf.Descriptors.FileDescriptor
-        .internalUpdateFileDescriptor(descriptor, registry);
-    com.google.api.ClientProto.getDescriptor();
-  }
-
-  // @@protoc_insertion_point(outer_class_scope)
-}

From 1ff61f48987f38df0d135e521faa5bac46cce001 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Tue, 13 Jun 2023 10:59:56 -0400
Subject: [PATCH 14/18] test: add unit tests to TypeParserTest

---
 .../gapic/protoparser/TypeParserTest.java     | 56 +++++++++++++++++
 .../src/test/proto/collisions.proto           | 62 +++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 gapic-generator-java/src/test/proto/collisions.proto

diff --git a/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java b/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java
index a79460e915..c04ebb610b 100644
--- a/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java
+++ b/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java
@@ -14,19 +14,34 @@
 
 package com.google.api.generator.gapic.protoparser;
 
+import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThrows;
 
 import com.google.api.generator.engine.ast.Reference;
+import com.google.api.generator.gapic.model.LongrunningOperation;
+import com.google.api.generator.gapic.model.Message;
+import com.google.protobuf.DescriptorProtos;
 import com.google.protobuf.Descriptors.Descriptor;
 import com.google.protobuf.Descriptors.FileDescriptor;
 import com.google.protobuf.Descriptors.MethodDescriptor;
 import com.google.protobuf.Descriptors.ServiceDescriptor;
+import com.google.showcase.v1beta1.CollisionsOuterClass;
 import com.google.showcase.v1beta1.EchoOuterClass;
 import com.google.testgapic.v1beta1.NestedMessageProto;
+import java.util.Map;
 import org.junit.Test;
 
 public class TypeParserTest {
   // TODO(miraleung): Backfill with more tests (e.g. field, message, methods) for Parser.java.
+
+  private static final FileDescriptor COLLISIONS_FILE_DESCRIPTOR =
+      CollisionsOuterClass.getDescriptor();
+  private static final FileDescriptor DESCRIPTOR_PROTOS_FILE_DESCRIPTOR =
+      DescriptorProtos.getDescriptor();
+  private static final ServiceDescriptor COLLISIONS_SERVICE =
+      COLLISIONS_FILE_DESCRIPTOR.getServices().get(0);
+
   @Test
   public void parseMessageType_basic() {
     FileDescriptor echoFileDescriptor = EchoOuterClass.getDescriptor();
@@ -51,4 +66,45 @@ public void parseMessageType_nested() {
     Reference reference = TypeParser.parseMessageReference(messageDescriptor);
     assertEquals("com.google.testgapic.v1beta1.Outer.Middle.Inner", reference.fullName());
   }
+
+  @Test
+  public void parseLroResponseMetadataType_shortName_shouldMatchSamePackage() {
+    Map<String, Message> messageTypes = Parser.parseMessages(COLLISIONS_FILE_DESCRIPTOR);
+    messageTypes.putAll(Parser.parseMessages(DESCRIPTOR_PROTOS_FILE_DESCRIPTOR));
+    MethodDescriptor shouldUseSamePackageTypesLro = COLLISIONS_SERVICE.getMethods().get(0);
+
+    LongrunningOperation testLro =
+        Parser.parseLro(
+            TypeParser.getPackage(COLLISIONS_FILE_DESCRIPTOR),
+            shouldUseSamePackageTypesLro,
+            messageTypes);
+
+    assertEquals(COLLISIONS_SERVICE.getName(), "Collisions");
+    assertThat(messageTypes)
+        .containsKey("com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation");
+    assertThat(messageTypes)
+        .containsKey("com.google.protobuf.DescriptorProtos.SourceCodeInfo.Location");
+    assertThat(testLro.responseType().reference().fullName())
+        .isEqualTo("com.google.showcase.v1beta1.Annotation");
+    assertThat(testLro.metadataType().reference().fullName())
+        .isEqualTo("com.google.showcase.v1beta1.Location");
+  }
+
+  @Test
+  public void parseLroResponseMetadataType_shortName_shouldNotMatch() {
+    Map<String, Message> messageTypes = Parser.parseMessages(COLLISIONS_FILE_DESCRIPTOR);
+    messageTypes.putAll(Parser.parseMessages(DESCRIPTOR_PROTOS_FILE_DESCRIPTOR));
+    MethodDescriptor shortNameMatchShouldThrowLro = COLLISIONS_SERVICE.getMethods().get(1);
+
+    assertEquals(COLLISIONS_SERVICE.getName(), "Collisions");
+    assertThat(messageTypes)
+        .containsKey("com.google.protobuf.DescriptorProtos.ExtensionRangeOptions.Declaration");
+    assertThrows(
+        NullPointerException.class,
+        () ->
+            Parser.parseLro(
+                TypeParser.getPackage(COLLISIONS_FILE_DESCRIPTOR),
+                shortNameMatchShouldThrowLro,
+                messageTypes));
+  }
 }
diff --git a/gapic-generator-java/src/test/proto/collisions.proto b/gapic-generator-java/src/test/proto/collisions.proto
new file mode 100644
index 0000000000..55c3b92a2e
--- /dev/null
+++ b/gapic-generator-java/src/test/proto/collisions.proto
@@ -0,0 +1,62 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+import "google/api/client.proto";
+import "google/longrunning/operations.proto";
+
+package google.showcase.v1beta1;
+
+option java_package = "com.google.showcase.v1beta1";
+option java_multiple_files = true;
+
+// This service exercises scenarios where short names of types
+// exhibit ambiguity or collide with other types
+service Collisions {
+
+  option (google.api.default_host) = "localhost:7469";
+
+  rpc shouldUseSamePackageTypesLro(Request) returns (google.longrunning.Operation) {
+    option (google.longrunning.operation_info) = {
+      // collision with com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation
+      response_type: "Annotation"
+      // collision with com.google.cloud.location.Location;
+      metadata_type: "Location"
+    };
+  }
+
+  rpc shortNameMatchShouldThrowLro(Request) returns (google.longrunning.Operation) {
+    option (google.longrunning.operation_info) = {
+      // collision with com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation
+      response_type: "Annotation"
+      // collision with com.google.protobuf.DescriptorProtos.ExtensionRangeOptions.Declaration
+      metadata_type: "Declaration"
+    };
+  }
+}
+
+message Request {
+  string name = 1;
+  Annotation annotation = 2;
+  Location location = 3;
+}
+
+message Annotation {
+  string name = 1;
+}
+
+message Location {
+  string name = 1;
+}
\ No newline at end of file

From 3703269e0b355d5bb06cc8b5bae5bcab68c5d533 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 14 Jun 2023 10:49:02 -0400
Subject: [PATCH 15/18] test: add writer unit test for generics import
 collision fix

---
 .../engine/writer/JavaWriterVisitorTest.java  | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java b/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java
index fa1301f49a..64a36809f5 100644
--- a/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java
+++ b/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java
@@ -2395,6 +2395,83 @@ public void writeClassDefinition_commentsStatementsAndMethods() {
     assertEquals(expected, writerVisitor.write());
   }
 
+  @Test
+  public void writeClassDefinition_withImportCollision() {
+
+    VaporReference firstLocationType =
+        VaporReference.builder()
+            .setName("Location")
+            .setPakkage("com.google.cloud.location")
+            .build();
+
+    VaporReference secondLocationType =
+        VaporReference.builder().setName("Location").setPakkage("com.sun.jdi").build();
+
+    Variable secondLocationVar =
+        Variable.builder()
+            .setName("anotherLocationVar")
+            .setType(TypeNode.withReference(secondLocationType))
+            .build();
+
+    MethodInvocationExpr genericMethodInvocation =
+        MethodInvocationExpr.builder()
+            .setMethodName("bar")
+            .setStaticReferenceType(TypeNode.withReference(firstLocationType))
+            .setGenerics(Arrays.asList(secondLocationType))
+            .setArguments(VariableExpr.withVariable(secondLocationVar))
+            .setReturnType(TypeNode.STRING)
+            .build();
+
+    VariableExpr varExpr =
+        VariableExpr.builder()
+            .setVariable(Variable.builder().setName("result").setType(TypeNode.STRING).build())
+            .setIsDecl(true)
+            .build();
+
+    AssignmentExpr assignmentExpr =
+        AssignmentExpr.builder()
+            .setVariableExpr(varExpr)
+            .setValueExpr(genericMethodInvocation)
+            .build();
+
+    List<Statement> statements = Arrays.asList(ExprStatement.withExpr(assignmentExpr));
+
+    MethodDefinition methodOne =
+        MethodDefinition.builder()
+            .setName("doSomething")
+            .setScope(ScopeNode.PRIVATE)
+            .setBody(statements)
+            .setReturnType(TypeNode.VOID)
+            .build();
+
+    List<MethodDefinition> methods = Arrays.asList(methodOne);
+
+    ClassDefinition classDef =
+        ClassDefinition.builder()
+            .setPackageString("com.google.example.library.v1.stub")
+            .setName("FooService")
+            .setScope(ScopeNode.PUBLIC)
+            .setMethods(methods)
+            .build();
+
+    classDef.accept(writerVisitor);
+
+    String expected =
+        LineFormatter.lines(
+            "package com.google.example.library.v1.stub;\n"
+                + "\n"
+                + "import com.google.cloud.location.Location;\n"
+                + "\n"
+                + "public class FooService {\n"
+                + "\n"
+                + "  private void doSomething() {\n"
+                + "    String result = Location.<com.sun.jdi.Location>bar(anotherLocationVar);\n"
+                + "  }\n"
+                + "}\n");
+
+    assertThat(writerVisitor.write()).isEqualTo(expected);
+  }
+
   @Test
   public void writeReferenceConstructorExpr_thisConstructorWithArguments() {
     VaporReference ref =

From 06dbf1fab97930d392a077e740a1d743fef7cde8 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 14 Jun 2023 11:41:13 -0400
Subject: [PATCH 16/18] test: undo changes to showcase-extended setup

---
 showcase/BUILD.bazel                          | 25 ++++-----
 .../gapic-showcase-extended/proto/BUILD.bazel | 19 +++----
 .../proto/collisions.proto                    | 51 -------------------
 showcase/scripts/update.sh                    |  4 +-
 showcase/scripts/verify.sh                    |  4 +-
 5 files changed, 23 insertions(+), 80 deletions(-)
 delete mode 100644 showcase/gapic-showcase-extended/proto/collisions.proto

diff --git a/showcase/BUILD.bazel b/showcase/BUILD.bazel
index 5fb79c83a2..9c893230e0 100644
--- a/showcase/BUILD.bazel
+++ b/showcase/BUILD.bazel
@@ -17,7 +17,7 @@ proto_library_with_info(
     name = "showcase_proto_with_info",
     deps = [
         "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_proto",
-        # "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
+#        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
         "@com_google_googleapis//google/cloud:common_resources_proto",
         "@com_google_googleapis//google/cloud/location:location_proto"
     ],
@@ -27,7 +27,7 @@ java_proto_library(
     name = "showcase_java_proto",
     deps = [
         "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_proto",
-        # "//showcase/gapic-showcase-extended/proto:showcase_proto_extended"
+#       "//showcase/gapic-showcase-extended/proto:showcase_proto_extended"
 ],
 )
 
@@ -37,13 +37,13 @@ java_grpc_library(
     deps = [":showcase_java_proto"],
 )
 
-# java_grpc_library(
-#     name = "showcase_java_grpc_extended",
-#     srcs = [
-#         "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
-#     ],
-#     deps = [":showcase_java_proto"],
-# )
+#java_grpc_library(
+#    name = "showcase_java_grpc_extended",
+#    srcs = [
+#        "//showcase/gapic-showcase-extended/proto:showcase_proto_extended",
+#    ],
+#    deps = [":showcase_java_proto"],
+#)
 
 java_gapic_library(
     name = "showcase_java_gapic",
@@ -56,7 +56,7 @@ java_gapic_library(
     service_yaml = "@com_google_gapic_showcase//schema/google/showcase/v1beta1:showcase_v1beta1.yaml",
     test_deps = [
         ":showcase_java_grpc",
-        # ":showcase_java_grpc_extended",
+#        ":showcase_java_grpc_extended",
         "@com_google_googleapis//google/cloud/location:location_java_grpc"
     ],
     transport = "grpc+rest",
@@ -121,10 +121,10 @@ sh_binary(
 # GRPC Showcase : Update and Verify
 GRPC_DATA = [
     "libshowcase_java_grpc-src.jar",
-    # "libshowcase_java_grpc_extended-src.jar",
+#    "libshowcase_java_grpc_extended-src.jar",
     ":grpc_gapic_showcase_files",
     ":showcase_java_grpc",
-    # ":showcase_java_grpc_extended"
+#    ":showcase_java_grpc_extended"
 ]
 
 sh_binary(
@@ -146,6 +146,7 @@ PROTO_DATA = [
     "proto-google-cloud-showcase-v1beta1-java.tar.gz",
     ":proto_gapic_showcase_files",
     ":showcase_java_proto",
+#    ":showcase_java_proto_extended",
 ]
 
 sh_binary(
diff --git a/showcase/gapic-showcase-extended/proto/BUILD.bazel b/showcase/gapic-showcase-extended/proto/BUILD.bazel
index ec22f33770..bc57596d1b 100644
--- a/showcase/gapic-showcase-extended/proto/BUILD.bazel
+++ b/showcase/gapic-showcase-extended/proto/BUILD.bazel
@@ -16,8 +16,7 @@
 Provides proto_library target
 Exports grpc service config
 """
-
-load("@rules_proto//proto:defs.bzl", "proto_library")
+load ("@rules_proto//proto:defs.bzl", "proto_library")
 
 # This is an API workspace, having public visibility by default makes perfect sense.
 package(default_visibility = ["//visibility:public"])
@@ -28,14 +27,8 @@ package(default_visibility = ["//visibility:public"])
 # gapic-showcase project is used to test the generated client behavior with a showcase server
 # gapic-showcase-extension project is used to test the generator's behavior
 
-# proto_library(
-#     name = "showcase_proto_extended",
-#     srcs = [
-#         ":collisions.proto",
-#         ":wicked.proto",
-#     ],
-#     deps = [
-#         "@com_google_googleapis//google/api:client_proto",
-#         "@com_google_googleapis//google/longrunning:operations_proto",
-#     ],
-# )
+#proto_library(
+#  name = "showcase_proto_extended",
+#  srcs = [],
+#  deps = []
+#)
\ No newline at end of file
diff --git a/showcase/gapic-showcase-extended/proto/collisions.proto b/showcase/gapic-showcase-extended/proto/collisions.proto
deleted file mode 100644
index aaf2f92f9b..0000000000
--- a/showcase/gapic-showcase-extended/proto/collisions.proto
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2023 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-import "google/api/client.proto";
-import "google/longrunning/operations.proto";
-
-package google.showcase.v1beta1;
-
-option java_package = "com.google.showcase.v1beta1";
-option java_multiple_files = true;
-
-// This service exercises scenarios where short names of types
-// exhibit ambiguity or collide with other types
-service Collisions {
-
-  option (google.api.default_host) = "localhost:7469";
-
-  rpc doSomething(Request) returns (google.longrunning.Operation) {
-    option (google.longrunning.operation_info) = {
-      response_type: "Annotation"
-      metadata_type: "Location"
-    };
-  }
-}
-
-message Request {
-  string name = 1;
-  Annotation annotation = 2;
-  Location location = 3;
-}
-
-message Annotation {
-  string name = 1;
-}
-
-message Location {
-  string name = 1;
-}
\ No newline at end of file
diff --git a/showcase/scripts/update.sh b/showcase/scripts/update.sh
index a0e6547ed5..f7b7e4ee7a 100755
--- a/showcase/scripts/update.sh
+++ b/showcase/scripts/update.sh
@@ -40,13 +40,13 @@ case $1 in
   grpc)
     GRPC_PROJECT_DIR=grpc-gapic-showcase-v1beta1
     GRPC_JAR=$(find . -name 'libshowcase_java_grpc-src.jar')
-    # GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
+#    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
     clear_existing $GRPC_PROJECT_DIR
     create_unpack_dir grpc_unpacked
     GRPC_UNPACK_DIR=$PWD
 
     jar xf "$BAZEL_ROOT/$GRPC_JAR"
-    # jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
+#    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
     cd "$BUILD_WORKSPACE_DIRECTORY/showcase/$GRPC_PROJECT_DIR"
     mkdir -p ./src/main/java/com
     cp -r "$GRPC_UNPACK_DIR"/com/* ./src/main/java/com
diff --git a/showcase/scripts/verify.sh b/showcase/scripts/verify.sh
index b7827cb72d..80cac43cad 100755
--- a/showcase/scripts/verify.sh
+++ b/showcase/scripts/verify.sh
@@ -39,12 +39,12 @@ case $1 in
   grpc)
     GRPC_PROJECT_DIR=grpc-gapic-showcase-v1beta1
     GRPC_JAR=$(find . -name 'libshowcase_java_grpc-src.jar')
-    # GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
+#    GRPC_JAR_EXTENDED=$(find . -name 'libshowcase_java_grpc_extended-src.jar')
     create_unpack_dir grpc_unpacked
     GRPC_UNPACK_DIR=$PWD
 
     jar xf "$BAZEL_ROOT/$GRPC_JAR"
-    # jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
+#    jar xf "$BAZEL_ROOT/$GRPC_JAR_EXTENDED"
     delete_unneeded
     diff -ru "$SHOWCASE_DIR/$GRPC_PROJECT_DIR"/src/main/java/com "$GRPC_UNPACK_DIR"/com
     ;;

From ba60786f2118c687cb4b070f50a253dc09403da8 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 14 Jun 2023 12:46:20 -0400
Subject: [PATCH 17/18] test: update unit tests for lro type parsing

---
 .../gapic/protoparser/TypeParserTest.java     | 47 +++++++++++++++----
 .../src/test/proto/collisions.proto           | 20 ++++++--
 2 files changed, 54 insertions(+), 13 deletions(-)

diff --git a/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java b/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java
index c04ebb610b..455f04bcae 100644
--- a/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java
+++ b/gapic-generator-java/src/test/java/com/google/api/generator/gapic/protoparser/TypeParserTest.java
@@ -21,13 +21,14 @@
 import com.google.api.generator.engine.ast.Reference;
 import com.google.api.generator.gapic.model.LongrunningOperation;
 import com.google.api.generator.gapic.model.Message;
+import com.google.cloud.location.LocationsProto;
 import com.google.protobuf.DescriptorProtos;
 import com.google.protobuf.Descriptors.Descriptor;
 import com.google.protobuf.Descriptors.FileDescriptor;
 import com.google.protobuf.Descriptors.MethodDescriptor;
 import com.google.protobuf.Descriptors.ServiceDescriptor;
-import com.google.showcase.v1beta1.CollisionsOuterClass;
 import com.google.showcase.v1beta1.EchoOuterClass;
+import com.google.test.collisions.CollisionsOuterClass;
 import com.google.testgapic.v1beta1.NestedMessageProto;
 import java.util.Map;
 import org.junit.Test;
@@ -39,6 +40,8 @@ public class TypeParserTest {
       CollisionsOuterClass.getDescriptor();
   private static final FileDescriptor DESCRIPTOR_PROTOS_FILE_DESCRIPTOR =
       DescriptorProtos.getDescriptor();
+  private static final FileDescriptor LOCATION_PROTO_FILE_DESCRIPTOR =
+      LocationsProto.getDescriptor();
   private static final ServiceDescriptor COLLISIONS_SERVICE =
       COLLISIONS_FILE_DESCRIPTOR.getServices().get(0);
 
@@ -71,23 +74,26 @@ public void parseMessageType_nested() {
   public void parseLroResponseMetadataType_shortName_shouldMatchSamePackage() {
     Map<String, Message> messageTypes = Parser.parseMessages(COLLISIONS_FILE_DESCRIPTOR);
     messageTypes.putAll(Parser.parseMessages(DESCRIPTOR_PROTOS_FILE_DESCRIPTOR));
+    messageTypes.putAll(Parser.parseMessages(LOCATION_PROTO_FILE_DESCRIPTOR));
     MethodDescriptor shouldUseSamePackageTypesLro = COLLISIONS_SERVICE.getMethods().get(0);
 
+    assertEquals(COLLISIONS_SERVICE.getName(), "Collisions");
+    assertThat(messageTypes)
+        .containsKey("com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation");
+    assertThat(messageTypes)
+        .containsKey("com.google.protobuf.DescriptorProtos.SourceCodeInfo.Location");
+    assertThat(messageTypes).containsKey("com.google.cloud.location.Location");
+
     LongrunningOperation testLro =
         Parser.parseLro(
             TypeParser.getPackage(COLLISIONS_FILE_DESCRIPTOR),
             shouldUseSamePackageTypesLro,
             messageTypes);
 
-    assertEquals(COLLISIONS_SERVICE.getName(), "Collisions");
-    assertThat(messageTypes)
-        .containsKey("com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation");
-    assertThat(messageTypes)
-        .containsKey("com.google.protobuf.DescriptorProtos.SourceCodeInfo.Location");
     assertThat(testLro.responseType().reference().fullName())
-        .isEqualTo("com.google.showcase.v1beta1.Annotation");
+        .isEqualTo("com.google.test.collisions.Annotation");
     assertThat(testLro.metadataType().reference().fullName())
-        .isEqualTo("com.google.showcase.v1beta1.Location");
+        .isEqualTo("com.google.test.collisions.Location");
   }
 
   @Test
@@ -99,6 +105,7 @@ public void parseLroResponseMetadataType_shortName_shouldNotMatch() {
     assertEquals(COLLISIONS_SERVICE.getName(), "Collisions");
     assertThat(messageTypes)
         .containsKey("com.google.protobuf.DescriptorProtos.ExtensionRangeOptions.Declaration");
+
     assertThrows(
         NullPointerException.class,
         () ->
@@ -107,4 +114,28 @@ public void parseLroResponseMetadataType_shortName_shouldNotMatch() {
                 shortNameMatchShouldThrowLro,
                 messageTypes));
   }
+
+  @Test
+  public void parseLroResponseMetadataType_shortName_withFullyQualifiedCollision() {
+    Map<String, Message> messageTypes = Parser.parseMessages(COLLISIONS_FILE_DESCRIPTOR);
+    messageTypes.putAll(Parser.parseMessages(DESCRIPTOR_PROTOS_FILE_DESCRIPTOR));
+    messageTypes.putAll(Parser.parseMessages(LOCATION_PROTO_FILE_DESCRIPTOR));
+    MethodDescriptor fullNameForDifferentPackageLro = COLLISIONS_SERVICE.getMethods().get(2);
+
+    assertEquals(COLLISIONS_SERVICE.getName(), "Collisions");
+    assertThat(messageTypes).containsKey("com.google.cloud.location.Location");
+    assertThat(messageTypes)
+        .containsKey("com.google.protobuf.DescriptorProtos.SourceCodeInfo.Location");
+
+    LongrunningOperation testLro =
+        Parser.parseLro(
+            TypeParser.getPackage(COLLISIONS_FILE_DESCRIPTOR),
+            fullNameForDifferentPackageLro,
+            messageTypes);
+
+    assertThat(testLro.responseType().reference().fullName())
+        .isEqualTo("com.google.cloud.location.Location");
+    assertThat(testLro.metadataType().reference().fullName())
+        .isEqualTo("com.google.test.collisions.Location");
+  }
 }
diff --git a/gapic-generator-java/src/test/proto/collisions.proto b/gapic-generator-java/src/test/proto/collisions.proto
index 55c3b92a2e..03c1060d8e 100644
--- a/gapic-generator-java/src/test/proto/collisions.proto
+++ b/gapic-generator-java/src/test/proto/collisions.proto
@@ -19,7 +19,7 @@ import "google/longrunning/operations.proto";
 
 package google.showcase.v1beta1;
 
-option java_package = "com.google.showcase.v1beta1";
+option java_package = "com.google.test.collisions";
 option java_multiple_files = true;
 
 // This service exercises scenarios where short names of types
@@ -30,21 +30,31 @@ service Collisions {
 
   rpc shouldUseSamePackageTypesLro(Request) returns (google.longrunning.Operation) {
     option (google.longrunning.operation_info) = {
-      // collision with com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation
+      // collision with google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation
       response_type: "Annotation"
-      // collision with com.google.cloud.location.Location;
+      // collision with google.cloud.location.Location;
       metadata_type: "Location"
     };
   }
 
   rpc shortNameMatchShouldThrowLro(Request) returns (google.longrunning.Operation) {
     option (google.longrunning.operation_info) = {
-      // collision with com.google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation
+      // collision with google.protobuf.DescriptorProtos.GeneratedCodeInfo.Annotation
       response_type: "Annotation"
-      // collision with com.google.protobuf.DescriptorProtos.ExtensionRangeOptions.Declaration
+      // collision with google.protobuf.DescriptorProtos.ExtensionRangeOptions.Declaration
+      // not a valid short name specification (no such type exist in same package)
       metadata_type: "Declaration"
     };
   }
+
+  rpc fullNameForDifferentPackageLro(Request) returns (google.longrunning.Operation) {
+    option (google.longrunning.operation_info) = {
+      // fully qualified name should match google.cloud.location.Location
+      response_type: "google.cloud.location.Location"
+      // short name only should match Location message defined below
+      metadata_type: "Location"
+    };
+  }
 }
 
 message Request {

From ba1d1afbb493c0d001e159f879c4dedab1aeb621 Mon Sep 17 00:00:00 2001
From: Emily Wang <emmwang@google.com>
Date: Wed, 14 Jun 2023 12:57:38 -0400
Subject: [PATCH 18/18] test: update unit tests for writer import collision fix

---
 .../engine/writer/JavaWriterVisitorTest.java  | 46 +++++++------------
 1 file changed, 17 insertions(+), 29 deletions(-)

diff --git a/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java b/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java
index 64a36809f5..578e0d661f 100644
--- a/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java
+++ b/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/JavaWriterVisitorTest.java
@@ -2398,43 +2398,31 @@ public void writeClassDefinition_commentsStatementsAndMethods() {
   @Test
   public void writeClassDefinition_withImportCollision() {
 
-    VaporReference firstLocationType =
+    VaporReference firstType =
         VaporReference.builder()
-            .setName("Location")
-            .setPakkage("com.google.cloud.location")
+            .setName("Service")
+            .setPakkage("com.google.api.generator.gapic.model")
             .build();
 
-    VaporReference secondLocationType =
-        VaporReference.builder().setName("Location").setPakkage("com.sun.jdi").build();
+    VaporReference secondType =
+        VaporReference.builder().setName("Service").setPakkage("com.google.api").build();
 
-    Variable secondLocationVar =
+    Variable secondTypeVar =
         Variable.builder()
-            .setName("anotherLocationVar")
-            .setType(TypeNode.withReference(secondLocationType))
+            .setName("anotherServiceVar")
+            .setType(TypeNode.withReference(secondType))
             .build();
 
     MethodInvocationExpr genericMethodInvocation =
         MethodInvocationExpr.builder()
-            .setMethodName("bar")
-            .setStaticReferenceType(TypeNode.withReference(firstLocationType))
-            .setGenerics(Arrays.asList(secondLocationType))
-            .setArguments(VariableExpr.withVariable(secondLocationVar))
+            .setMethodName("barMethod")
+            .setStaticReferenceType(TypeNode.withReference(firstType))
+            .setGenerics(Arrays.asList(secondType))
+            .setArguments(VariableExpr.withVariable(secondTypeVar))
             .setReturnType(TypeNode.STRING)
             .build();
 
-    VariableExpr varExpr =
-        VariableExpr.builder()
-            .setVariable(Variable.builder().setName("result").setType(TypeNode.STRING).build())
-            .setIsDecl(true)
-            .build();
-
-    AssignmentExpr assignmentExpr =
-        AssignmentExpr.builder()
-            .setVariableExpr(varExpr)
-            .setValueExpr(genericMethodInvocation)
-            .build();
-
-    List<Statement> statements = Arrays.asList(ExprStatement.withExpr(assignmentExpr));
+    List<Statement> statements = Arrays.asList(ExprStatement.withExpr(genericMethodInvocation));
 
     MethodDefinition methodOne =
         MethodDefinition.builder()
@@ -2448,7 +2436,7 @@ public void writeClassDefinition_withImportCollision() {
 
     ClassDefinition classDef =
         ClassDefinition.builder()
-            .setPackageString("com.google.example.library.v1.stub")
+            .setPackageString("com.google.example")
             .setName("FooService")
             .setScope(ScopeNode.PUBLIC)
             .setMethods(methods)
@@ -2458,14 +2446,14 @@ public void writeClassDefinition_withImportCollision() {
 
     String expected =
         LineFormatter.lines(
-            "package com.google.example.library.v1.stub;\n"
+            "package com.google.example;\n"
                 + "\n"
-                + "import com.google.cloud.location.Location;\n"
+                + "import com.google.api.generator.gapic.model.Service;\n"
                 + "\n"
                 + "public class FooService {\n"
                 + "\n"
                 + "  private void doSomething() {\n"
-                + "    String result = Location.<com.sun.jdi.Location>bar(anotherLocationVar);\n"
+                + "    Service.<com.google.api.Service>barMethod(anotherServiceVar);\n"
                 + "  }\n"
                 + "}\n");