Method constructor

tfjs-data/src/iterators/lazy_iterator.ts:509–512

(
      protected nextFn: () => IteratorResult<T>| Promise<IteratorResult<T>>)

class FunctionCallIterator<T> extends LazyIterator<T> {
  constructor(
      protected nextFn: () => IteratorResult<T>| Promise<IteratorResult<T>>) {
    super();
  }

  summary() {
    return `Function call`;