1/*
2 * Copyright (c) 2022 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
16declare function print(arg:any):string;
17
18class Animal {
19  constructor() {}
20  static sayAnimal() {
21    return 'Animal big then ';
22  }
23}
24
25class Dog extends Animal {
26  static sayDog() {
27    return super.sayAnimal() + 'dog!';
28  }
29}
30
31print(Dog.sayDog());
32