Centralized event streams

runtime/observatory/lib/src/mocks/objects/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 ExceptionNotificationMock implements M.ExceptionNotification {
-  final Exception exception;
-  final StackTrace stacktrace;
-  const ExceptionNotificationMock({this.exception, this.stacktrace});
-}
-
-class EventNotificationMock implements M.EventNotification {
-  final M.Event event;
-  const EventNotificationMock({this.event});
-}