anchor.diff:      return c.future;
     }
   
  +  /// Returns [Storage] service.
     Storage storage() => new Storage.fromJsObject(jsObject.storage());
   }
  
positive.code: ///
  /// See: <https://firebase.google.com/docs/reference/js/firebase.app>.
  class App extends JsObjectWrapper {
    String get name => jsObject.name;
  
    FirebaseOptions _options;
    FirebaseOptions get options {
      if (_options != null) {
        _options.jsObject = jsObject.options;
  
negative.code:     return _options;
    }
  
    /// Creates a new App from [jsObject].
    App.fromJsObject(jsObject) : super.fromJsObject(jsObject);
  
    /// Returns [Auth] service.
    Auth auth() => new Auth.fromJsObject(jsObject.auth());
  
    /// Returns [Database] service.
    Database database() => new Database.fromJsObject(jsObject.database());
  
    /// Deletes the app and frees resources of all App's services.
    Future delete() {
      Completer c = new Completer();
      var jsPromise = jsObject.delete();
  