sample method
Emits the most recently emitted item (if any)
emitted by the source Stream since the previous emission from
the sampleStream
.
Example
Stream.fromIterable([1, 2, 3])
.sample(TimerStream(1, Duration(seconds: 1)))
.listen(print); // prints 3
Implementation
Stream<T> sample(Stream<dynamic> sampleStream) =>
SampleStreamTransformer<T>((_) => sampleStream).bind(this);