// 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 models; | |
abstract class Guarded<T> { | |
bool get isValue; | |
bool get isSentinel; | |
Sentinel get asSentinel; | |
T get asValue; | |
} |