[Server] Fix types and documentation

Author: afharo

docs/development/core/server/kibana-plugin-core-server.coresetup.md

@@ -25,5 +25,6 @@ export interface CoreSetup<TPluginsStart extends object = object, TStart = unkno
 |  [savedObjects](./kibana-plugin-core-server.coresetup.savedobjects.md) | <code>SavedObjectsServiceSetup</code> | [SavedObjectsServiceSetup](./kibana-plugin-core-server.savedobjectsservicesetup.md) |
 |  [status](./kibana-plugin-core-server.coresetup.status.md) | <code>StatusServiceSetup</code> | [StatusServiceSetup](./kibana-plugin-core-server.statusservicesetup.md) |
 |  [uiSettings](./kibana-plugin-core-server.coresetup.uisettings.md) | <code>UiSettingsServiceSetup</code> | [UiSettingsServiceSetup](./kibana-plugin-core-server.uisettingsservicesetup.md) |
+|  [usageCollection](./kibana-plugin-core-server.coresetup.usagecollection.md) | <code>UsageCollectionSetup</code> | [UsageCollectionSetup](./kibana-plugin-core-server.usagecollectionsetup.md) |
 |  [uuid](./kibana-plugin-core-server.coresetup.uuid.md) | <code>UuidServiceSetup</code> | [UuidServiceSetup](./kibana-plugin-core-server.uuidservicesetup.md) |
 

docs/development/core/server/kibana-plugin-core-server.coresetup.usagecollection.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [CoreSetup](./kibana-plugin-core-server.coresetup.md) &gt; [usageCollection](./kibana-plugin-core-server.coresetup.usagecollection.md)
+
+## CoreSetup.usageCollection property
+
+[UsageCollectionSetup](./kibana-plugin-core-server.usagecollectionsetup.md)
+
+<b>Signature:</b>
+
+```typescript
+usageCollection: UsageCollectionSetup;
+```

docs/development/core/server/kibana-plugin-core-server.md

@@ -29,6 +29,8 @@ The plugin integrates with the core system via lifecycle events: `setup`<!-- -->
 |  [SavedObjectsRepository](./kibana-plugin-core-server.savedobjectsrepository.md) |  |
 |  [SavedObjectsSerializer](./kibana-plugin-core-server.savedobjectsserializer.md) | A serializer that can be used to manually convert [raw](./kibana-plugin-core-server.savedobjectsrawdoc.md) or [sanitized](./kibana-plugin-core-server.savedobjectsanitizeddoc.md) documents to the other kind. |
 |  [SavedObjectTypeRegistry](./kibana-plugin-core-server.savedobjecttyperegistry.md) | Registry holding information about all the registered [saved object types](./kibana-plugin-core-server.savedobjectstype.md)<!-- -->. |
+|  [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) | Collector for reporting system stats |
+|  [UsageCollectionUsageCollector](./kibana-plugin-core-server.usagecollectionusagecollector.md) | Collector for reporting Usage stats |
 
 ## Enumerations
 
@@ -196,6 +198,8 @@ The plugin integrates with the core system via lifecycle events: `setup`<!-- -->
 |  [UiSettingsServiceSetup](./kibana-plugin-core-server.uisettingsservicesetup.md) |  |
 |  [UiSettingsServiceStart](./kibana-plugin-core-server.uisettingsservicestart.md) |  |
 |  [URLMeaningfulParts](./kibana-plugin-core-server.urlmeaningfulparts.md) | We define our own typings because the current version of @<!-- -->types/node declares properties to be optional "hostname?: string". Although, parse call returns "hostname: null \| string". |
+|  [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md) | Collector definition |
+|  [UsageCollectionCollectorSet](./kibana-plugin-core-server.usagecollectioncollectorset.md) |  |
 |  [UserProvidedValues](./kibana-plugin-core-server.userprovidedvalues.md) | Describes the values explicitly set by user. |
 |  [UuidServiceSetup](./kibana-plugin-core-server.uuidservicesetup.md) | APIs to access the application's instance uuid. |
 
@@ -289,4 +293,8 @@ The plugin integrates with the core system via lifecycle events: `setup`<!-- -->
 |  [StartServicesAccessor](./kibana-plugin-core-server.startservicesaccessor.md) | Allows plugins to get access to APIs available in start inside async handlers. Promise will not resolve until Core and plugin dependencies have completed <code>start</code>. This should only be used inside handlers registered during <code>setup</code> that will only be executed after <code>start</code> lifecycle. |
 |  [StringValidation](./kibana-plugin-core-server.stringvalidation.md) | Allows regex objects or a regex string |
 |  [UiSettingsType](./kibana-plugin-core-server.uisettingstype.md) | UI element type to represent the settings. |
+|  [UsageCollectionAllowedSchemaTypes](./kibana-plugin-core-server.usagecollectionallowedschematypes.md) | Allowed types in the schema definition |
+|  [UsageCollectionMakeSchemaFrom](./kibana-plugin-core-server.usagecollectionmakeschemafrom.md) | Schema definition of the returned object in the fetch method |
+|  [UsageCollectionPurify](./kibana-plugin-core-server.usagecollectionpurify.md) |  |
+|  [UsageCollectionSetup](./kibana-plugin-core-server.usagecollectionsetup.md) |  |
 

docs/development/core/server/kibana-plugin-core-server.usagecollectionallowedschematypes.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionAllowedSchemaTypes](./kibana-plugin-core-server.usagecollectionallowedschematypes.md)
+
+## UsageCollectionAllowedSchemaTypes type
+
+Allowed types in the schema definition
+
+<b>Signature:</b>
+
+```typescript
+export declare type AllowedSchemaTypes = 'keyword' | 'text' | 'number' | 'boolean' | 'long' | 'date' | 'float';
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector._constructor_.md

@@ -0,0 +1,21 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) &gt; [(constructor)](./kibana-plugin-core-server.usagecollectioncollector._constructor_.md)
+
+## UsageCollectionCollector.(constructor)
+
+Constructs a new instance of the `Collector` class
+
+<b>Signature:</b>
+
+```typescript
+constructor(log: Logger, { type, init, fetch, formatForBulkUpload, isReady, ...options }: CollectorOptions<T, U>);
+```
+
+## Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  log | <code>Logger</code> |  |
+|  { type, init, fetch, formatForBulkUpload, isReady, ...options } | <code>CollectorOptions&lt;T, U&gt;</code> |  |
+

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector.fetch.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) &gt; [fetch](./kibana-plugin-core-server.usagecollectioncollector.fetch.md)
+
+## UsageCollectionCollector.fetch property
+
+<b>Signature:</b>
+
+```typescript
+readonly fetch: CollectorOptions<T, U>['fetch'];
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector.init.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) &gt; [init](./kibana-plugin-core-server.usagecollectioncollector.init.md)
+
+## UsageCollectionCollector.init property
+
+<b>Signature:</b>
+
+```typescript
+readonly init?: CollectorOptions<T, U>['init'];
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector.isready.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) &gt; [isReady](./kibana-plugin-core-server.usagecollectioncollector.isready.md)
+
+## UsageCollectionCollector.isReady property
+
+<b>Signature:</b>
+
+```typescript
+readonly isReady: CollectorOptions<T, U>['isReady'];
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector.log.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) &gt; [log](./kibana-plugin-core-server.usagecollectioncollector.log.md)
+
+## UsageCollectionCollector.log property
+
+<b>Signature:</b>
+
+```typescript
+protected readonly log: Logger;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector.md

@@ -0,0 +1,30 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md)
+
+## UsageCollectionCollector class
+
+Collector for reporting system stats
+
+<b>Signature:</b>
+
+```typescript
+export declare class Collector<T = unknown, U = T> 
+```
+
+## Constructors
+
+|  Constructor | Modifiers | Description |
+|  --- | --- | --- |
+|  [(constructor)(log, { type, init, fetch, formatForBulkUpload, isReady, ...options })](./kibana-plugin-core-server.usagecollectioncollector._constructor_.md) |  | Constructs a new instance of the <code>Collector</code> class |
+
+## Properties
+
+|  Property | Modifiers | Type | Description |
+|  --- | --- | --- | --- |
+|  [fetch](./kibana-plugin-core-server.usagecollectioncollector.fetch.md) |  | <code>CollectorOptions&lt;T, U&gt;['fetch']</code> |  |
+|  [init](./kibana-plugin-core-server.usagecollectioncollector.init.md) |  | <code>CollectorOptions&lt;T, U&gt;['init']</code> |  |
+|  [isReady](./kibana-plugin-core-server.usagecollectioncollector.isready.md) |  | <code>CollectorOptions&lt;T, U&gt;['isReady']</code> |  |
+|  [log](./kibana-plugin-core-server.usagecollectioncollector.log.md) |  | <code>Logger</code> |  |
+|  [type](./kibana-plugin-core-server.usagecollectioncollector.type.md) |  | <code>CollectorOptions&lt;T, U&gt;['type']</code> |  |
+

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollector.type.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollector](./kibana-plugin-core-server.usagecollectioncollector.md) &gt; [type](./kibana-plugin-core-server.usagecollectioncollector.type.md)
+
+## UsageCollectionCollector.type property
+
+<b>Signature:</b>
+
+```typescript
+readonly type: CollectorOptions<T, U>['type'];
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectoroptions.fetch.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md) &gt; [fetch](./kibana-plugin-core-server.usagecollectioncollectoroptions.fetch.md)
+
+## UsageCollectionCollectorOptions.fetch property
+
+Method to fetch the stats to report. The returned object is embedded in the final telemetry payload
+
+<b>Signature:</b>
+
+```typescript
+fetch: (callCluster: LegacyAPICaller) => Promise<T> | T;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectoroptions.init.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md) &gt; [init](./kibana-plugin-core-server.usagecollectioncollectoroptions.init.md)
+
+## UsageCollectionCollectorOptions.init property
+
+Optional init function to set up the collector during startup. Only called once at the time of registering
+
+<b>Signature:</b>
+
+```typescript
+init?: Function;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectoroptions.isready.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md) &gt; [isReady](./kibana-plugin-core-server.usagecollectioncollectoroptions.isready.md)
+
+## UsageCollectionCollectorOptions.isReady property
+
+A method that must return `true` when ready to report stats.
+
+<b>Signature:</b>
+
+```typescript
+isReady: () => Promise<boolean> | boolean;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectoroptions.md

@@ -0,0 +1,24 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md)
+
+## UsageCollectionCollectorOptions interface
+
+Collector definition
+
+<b>Signature:</b>
+
+```typescript
+export interface CollectorOptions<T = unknown, U = T> 
+```
+
+## Properties
+
+|  Property | Type | Description |
+|  --- | --- | --- |
+|  [fetch](./kibana-plugin-core-server.usagecollectioncollectoroptions.fetch.md) | <code>(callCluster: LegacyAPICaller) =&gt; Promise&lt;T&gt; &#124; T</code> | Method to fetch the stats to report. The returned object is embedded in the final telemetry payload |
+|  [init](./kibana-plugin-core-server.usagecollectioncollectoroptions.init.md) | <code>Function</code> | Optional init function to set up the collector during startup. Only called once at the time of registering |
+|  [isReady](./kibana-plugin-core-server.usagecollectioncollectoroptions.isready.md) | <code>() =&gt; Promise&lt;boolean&gt; &#124; boolean</code> | A method that must return <code>true</code> when ready to report stats. |
+|  [schema](./kibana-plugin-core-server.usagecollectioncollectoroptions.schema.md) | <code>MakeSchemaFrom&lt;T&gt;</code> | Schema definition of the returned object in the fetch method |
+|  [type](./kibana-plugin-core-server.usagecollectioncollectoroptions.type.md) | <code>string</code> | The name of the collector (it will be reported under stack\_stats.kibana.plugins\[type\]) |
+

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectoroptions.schema.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md) &gt; [schema](./kibana-plugin-core-server.usagecollectioncollectoroptions.schema.md)
+
+## UsageCollectionCollectorOptions.schema property
+
+Schema definition of the returned object in the fetch method
+
+<b>Signature:</b>
+
+```typescript
+schema?: MakeSchemaFrom<T>;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectoroptions.type.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorOptions](./kibana-plugin-core-server.usagecollectioncollectoroptions.md) &gt; [type](./kibana-plugin-core-server.usagecollectioncollectoroptions.type.md)
+
+## UsageCollectionCollectorOptions.type property
+
+The name of the collector (it will be reported under stack\_stats.kibana.plugins\[type\])
+
+<b>Signature:</b>
+
+```typescript
+type: string;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectorset.makestatscollector.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorSet](./kibana-plugin-core-server.usagecollectioncollectorset.md) &gt; [makeStatsCollector](./kibana-plugin-core-server.usagecollectioncollectorset.makestatscollector.md)
+
+## UsageCollectionCollectorSet.makeStatsCollector property
+
+Create a Collector to report system stats
+
+<b>Signature:</b>
+
+```typescript
+makeStatsCollector: <T, U>(options: CollectorOptions<T, U>) => Collector<T, U>;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectorset.makeusagecollector.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorSet](./kibana-plugin-core-server.usagecollectioncollectorset.md) &gt; [makeUsageCollector](./kibana-plugin-core-server.usagecollectioncollectorset.makeusagecollector.md)
+
+## UsageCollectionCollectorSet.makeUsageCollector property
+
+Create a Collector to report usage stats
+
+<b>Signature:</b>
+
+```typescript
+makeUsageCollector: <T, U = T>(options: CollectorOptions<T, U>) => UsageCollector<T, U>;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectorset.md

@@ -0,0 +1,21 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorSet](./kibana-plugin-core-server.usagecollectioncollectorset.md)
+
+## UsageCollectionCollectorSet interface
+
+
+<b>Signature:</b>
+
+```typescript
+export interface UsageCollectionCollectorSet 
+```
+
+## Properties
+
+|  Property | Type | Description |
+|  --- | --- | --- |
+|  [makeStatsCollector](./kibana-plugin-core-server.usagecollectioncollectorset.makestatscollector.md) | <code>&lt;T, U&gt;(options: CollectorOptions&lt;T, U&gt;) =&gt; Collector&lt;T, U&gt;</code> | Create a Collector to report system stats |
+|  [makeUsageCollector](./kibana-plugin-core-server.usagecollectioncollectorset.makeusagecollector.md) | <code>&lt;T, U = T&gt;(options: CollectorOptions&lt;T, U&gt;) =&gt; UsageCollector&lt;T, U&gt;</code> | Create a Collector to report usage stats |
+|  [registerCollector](./kibana-plugin-core-server.usagecollectioncollectorset.registercollector.md) | <code>&lt;T, U&gt;(collector: Collector&lt;T, U&gt;) =&gt; void</code> | Register the collector generated by either of the <code>makeStatsCollector</code> or <code>makeUsageCollector</code> methods |
+

docs/development/core/server/kibana-plugin-core-server.usagecollectioncollectorset.registercollector.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionCollectorSet](./kibana-plugin-core-server.usagecollectioncollectorset.md) &gt; [registerCollector](./kibana-plugin-core-server.usagecollectioncollectorset.registercollector.md)
+
+## UsageCollectionCollectorSet.registerCollector property
+
+Register the collector generated by either of the `makeStatsCollector` or `makeUsageCollector` methods
+
+<b>Signature:</b>
+
+```typescript
+registerCollector: <T, U>(collector: Collector<T, U>) => void;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectionmakeschemafrom.md

@@ -0,0 +1,19 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionMakeSchemaFrom](./kibana-plugin-core-server.usagecollectionmakeschemafrom.md)
+
+## UsageCollectionMakeSchemaFrom type
+
+Schema definition of the returned object in the fetch method
+
+<b>Signature:</b>
+
+```typescript
+export declare type MakeSchemaFrom<Base> = {
+    [Key in Purify<Extract<keyof Base, string>>]: Base[Key] extends Array<infer U> ? {
+        type: AllowedSchemaTypes;
+    } : Base[Key] extends object ? MakeSchemaFrom<Base[Key]> : {
+        type: AllowedSchemaTypes;
+    };
+};
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectionpurify.md

@@ -0,0 +1,14 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionPurify](./kibana-plugin-core-server.usagecollectionpurify.md)
+
+## UsageCollectionPurify type
+
+
+<b>Signature:</b>
+
+```typescript
+export declare type Purify<T extends string> = {
+    [P in T]: T;
+}[T];
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectionsetup.md

@@ -0,0 +1,12 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionSetup](./kibana-plugin-core-server.usagecollectionsetup.md)
+
+## UsageCollectionSetup type
+
+
+<b>Signature:</b>
+
+```typescript
+export declare type UsageCollectionSetup = Pick<UsageCollectionCollectorSet, 'makeStatsCollector' | 'makeUsageCollector' | 'registerCollector' | 'areAllCollectorsReady' | 'bulkFetchUsage' | 'toObject' | 'toApiFieldNames' | 'getFilteredCollectorSet' | 'isUsageCollector' | 'getCollectorByType'>;
+```

docs/development/core/server/kibana-plugin-core-server.usagecollectionusagecollector.md

@@ -0,0 +1,17 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [UsageCollectionUsageCollector](./kibana-plugin-core-server.usagecollectionusagecollector.md)
+
+## UsageCollectionUsageCollector class
+
+Collector for reporting Usage stats
+
+<b>Signature:</b>
+
+```typescript
+export declare class UsageCollector<T = unknown, U = {
+    usage: {
+        [key: string]: T;
+    };
+}> extends Collector<T, U> 
+```