1/*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16interface MutableState<Value> {}
17
18class StateImpl<Value> implements MutableState<Value> {}
19
20interface StateManager  {
21    foo<Value>(equivalent?: ValueTracker<Value>, tracker?: ValueTracker<Value>): MutableState<Value>
22}
23
24interface ValueTracker<Value> {}
25
26class StateManagerImpl implements StateManager {
27    foo<Value>( equivalent?:ValueTracker<Value>, tracker?:ValueTracker<Value>): StateImpl<Value> {
28        return new StateImpl<Value>()
29    }
30}
31