HarmonyOS 如何给类设置迭代器

参考以下代码：

class newiterator {
  constructor(start, stop) {
    this.value = start;
    this.stop = stop;
  }
  // Iterator接口 返回本身
  [Symbol.iterator]() {
    return this;
  }

  next() {
    if (this.value < this.stop) {
      return { value: this.value++, done: false };
    }
    return { value: undefined, done: true };
  }
}

const iterator = new newiterator(0, 3);

for (let key of iterator) {
  console.log(key);
}