diff --git a/src/v1beta1/doc/google/iam/v1/doc_policy.js b/src/v1beta1/doc/google/iam/v1/doc_policy.js
index 59fca188..5e7237e0 100644
--- a/src/v1beta1/doc/google/iam/v1/doc_policy.js
+++ b/src/v1beta1/doc/google/iam/v1/doc_policy.js
@@ -115,48 +115,4 @@ const Policy = {
  */
 const Binding = {
   // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * The difference delta between two policies.
- *
- * @property {Object[]} bindingDeltas
- *   The delta for Bindings between two policies.
- *
- *   This object should have the same structure as [BindingDelta]{@link google.iam.v1.BindingDelta}
- *
- * @typedef PolicyDelta
- * @memberof google.iam.v1
- * @see [google.iam.v1.PolicyDelta definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/iam/v1/policy.proto}
- */
-const PolicyDelta = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * One delta entry for Binding. Each individual change (only one member in each
- * entry) to a binding will be a separate entry.
- *
- * @property {number} action
- *   The action that was performed on a Binding.
- *   Required
- *
- *   The number should be among the values of [Action]{@link google.iam.v1.Action}
- *
- * @property {string} role
- *   Role that is assigned to `members`.
- *   For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
- *   Required
- *
- * @property {string} member
- *   A single identity requesting access for a Cloud Platform resource.
- *   Follows the same format of Binding.members.
- *   Required
- *
- * @typedef BindingDelta
- * @memberof google.iam.v1
- * @see [google.iam.v1.BindingDelta definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/iam/v1/policy.proto}
- */
-const BindingDelta = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/src/v1beta1/doc/google/longrunning/doc_operations.js b/src/v1beta1/doc/google/longrunning/doc_operations.js
index 4af5d7d3..e6dd81d4 100644
--- a/src/v1beta1/doc/google/longrunning/doc_operations.js
+++ b/src/v1beta1/doc/google/longrunning/doc_operations.js
@@ -60,88 +60,4 @@
  */
 const Operation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * The request message for Operations.GetOperation.
- *
- * @property {string} name
- *   The name of the operation resource.
- *
- * @typedef GetOperationRequest
- * @memberof google.longrunning
- * @see [google.longrunning.GetOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
- */
-const GetOperationRequest = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * The request message for Operations.ListOperations.
- *
- * @property {string} name
- *   The name of the operation collection.
- *
- * @property {string} filter
- *   The standard list filter.
- *
- * @property {number} pageSize
- *   The standard list page size.
- *
- * @property {string} pageToken
- *   The standard list page token.
- *
- * @typedef ListOperationsRequest
- * @memberof google.longrunning
- * @see [google.longrunning.ListOperationsRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
- */
-const ListOperationsRequest = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * The response message for Operations.ListOperations.
- *
- * @property {Object[]} operations
- *   A list of operations that matches the specified filter in the request.
- *
- *   This object should have the same structure as [Operation]{@link google.longrunning.Operation}
- *
- * @property {string} nextPageToken
- *   The standard List next-page token.
- *
- * @typedef ListOperationsResponse
- * @memberof google.longrunning
- * @see [google.longrunning.ListOperationsResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
- */
-const ListOperationsResponse = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * The request message for Operations.CancelOperation.
- *
- * @property {string} name
- *   The name of the operation resource to be cancelled.
- *
- * @typedef CancelOperationRequest
- * @memberof google.longrunning
- * @see [google.longrunning.CancelOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
- */
-const CancelOperationRequest = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
-};
-
-/**
- * The request message for Operations.DeleteOperation.
- *
- * @property {string} name
- *   The name of the operation resource to be deleted.
- *
- * @typedef DeleteOperationRequest
- * @memberof google.longrunning
- * @see [google.longrunning.DeleteOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
- */
-const DeleteOperationRequest = {
-  // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/synth.metadata b/synth.metadata
index f26e69af..fc222222 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -1,26 +1,38 @@
 {
+  "updateTime": "2019-01-03T17:55:38.797029Z",
   "sources": [
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.4",
+        "dockerImage": "googleapis/artman@sha256:8b45fae963557c3299921037ecbb86f0689f41b1b4aea73408ebc50562cb2857"
+      }
+    },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
-        "internalRef": "221837528"
+        "sha": "2a5caab4315cb5ab3d5c97c90c6d4e9441052b16",
+        "internalRef": "227195651"
       }
     },
     {
-      "git": {
-        "name": "googleapis-private",
-        "remote": "https://github.com/googleapis/googleapis-private.git",
-        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
-        "internalRef": "221340946"
+      "template": {
+        "name": "node_library",
+        "origin": "synthtool.gcp",
+        "version": "2018.12.6"
       }
-    },
+    }
+  ],
+  "destinations": [
     {
-      "generator": {
-        "name": "artman",
-        "version": "0.16.0",
-        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      "client": {
+        "source": "googleapis",
+        "apiName": "asset",
+        "apiVersion": "v1beta1",
+        "language": "nodejs",
+        "generator": "gapic",
+        "config": "google/cloud/asset/artman_cloudasset_v1beta1.yaml"
       }
     }
   ]