Centralized event streams

runtime/observatory/tests/observatory_ui/mocks/repositories/notification.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file
 
 part of mocks;
 
 class NotificationChangeEventMock implements M.NotificationChangeEvent {
   final NotificationRepositoryMock repository;
   const NotificationChangeEventMock({this.repository});
 }
@@ skipping 38 matching lines @@
     _onChange.add(new NotificationChangeEventMock(repository: this));
   }
 
   NotificationRepositoryMock({Iterable<M.Notification> list : const [],
       NotificationRepositoryMockCallback add,
       NotificationRepositoryMockCallback delete})
     : _list = list,
       _add = add,
       _delete = delete;
 }