marked _serverApps as internal

Author: DellaBitta

common/api-review/app.api.md

@@ -134,7 +134,7 @@ export function _removeServiceInstance<T extends Name>(app: FirebaseApp, name: T
 // @public
 export const SDK_VERSION: string;
 
-// @public (undocumented)
+// @internal (undocumented)
 export const _serverApps: Map<string, FirebaseServerApp>;
 
 // @public

docs-devsite/app.md

@@ -50,7 +50,6 @@ This package coordinates the communication between the different Firebase compon
 
 |  Variable | Description |
 |  --- | --- |
-|  [\_serverApps](./app.md#_serverapps) |  |
 |  [SDK\_VERSION](./app.md#sdk_version) | The current SDK version. |
 
 ## function(app, ...)
@@ -361,14 +360,6 @@ initializeServerApp({
 
 ```
 
-## \_serverApps
-
-<b>Signature:</b>
-
-```typescript
-_serverApps: Map<string, FirebaseServerApp>
-```
-
 ## SDK\_VERSION
 
 The current SDK version.

packages/app/src/internal.ts

@@ -30,6 +30,10 @@ import { FirebaseServerAppImpl } from './firebaseServerApp';
  * @internal
  */
 export const _apps = new Map<string, FirebaseApp>();
+
+/**
+ * @internal
+ */
 export const _serverApps = new Map<string, FirebaseServerApp>();
 
 /**