doOnPause method Null safety

Stream<T> doOnPause(
  1. void onPause(
      )
    )

    Invokes the given callback function when the stream subscription is paused.

    Example

    final subscription = Stream.fromIterable([1])
  .doOnPause(() => print('Gimme a minute please'))
  .listen(null);

subscription.pause(); // prints 'Gimme a minute please'

    Implementation

    Stream<T> doOnPause(void Function() onPause) =>
    transform(DoStreamTransformer<T>(onPause: onPause));