// Copyright 2018 The Fuchsia Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style license that can be | |
// found in the LICENSE file. | |
// More members will likely be added later on. | |
// ignore_for_file: one_member_abstracts | |
/// Observes values. | |
abstract class ValueObserver { | |
/// Called whenever the observed value changes. | |
void valueWasChanged(); | |
} |