Function constructor

tfjs-data/src/iterators/lazy_iterator.ts:836–840

()

  protected outputQueue: RingBuffer<T>;

  constructor() {
    super();
    this.outputQueue = new GrowingRingBuffer<T>();
    this.lastRead = Promise.resolve({value: null, done: false});
  }

  async next(): Promise<IteratorResult<T>> {
    // This sets this.lastRead to a new Promise right away, as opposed to