Centralized event streams

runtime/observatory/lib/src/mocks/repositories/flag.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;
-
-typedef Future<Iterable<M.Flag>> FlagsRepositoryMockCallback(M.VMRef vm);
-
-class FlagsRepositoryMock implements M.FlagsRepository {
-  final FlagsRepositoryMockCallback _list;
-
-  Future<Iterable<M.Flag>> list(M.VMRef vm) {
-    if (_list != null) {
-      return _list(vm);
-    }
-    return new Future.value(const []);
-  }
-
-  FlagsRepositoryMock({FlagsRepositoryMockCallback list})
-    : _list = list;
-}