message: Deprecate `closeDB()` on indexeddb source
diff: @@ -21,7 +21,7 @@ import Orbit, {
  import { supportsIndexedDB } from './lib/indexeddb';
  import IndexedDBCache, { IndexedDBCacheSettings } from './cache';
  -const { assert } = Orbit;
  +const { assert, deprecate } = Orbit;
  export interface IndexedDBSourceSettings extends SourceSettings {
  namespace?: string;
  @@ -86,6 +86,11 @@ export default class IndexedDBSource extends Source
  await this._cache.reopenDB();
  }
  + closeDB() {
  + deprecate('`closeDB()` must be called as `cache.closeDB()`.');
  + return this.cache.closeDB();
  + }
  +
  /////////////////////////////////////////////////////////////////////////////
  // Resettable interface implementation
  /////////////////////////////////////////////////////////////////////////////
  