concatWith method
Returns a Stream that emits all items from the current Stream, then emits all items from the given streams, one after the next.
Example
TimerStream(1, Duration(seconds: 10))
.concatWith([Stream.fromIterable([2])])
.listen(print); // prints 1, 2
Implementation
Stream<T> concatWith(Iterable<Stream<T>> other) {
final concatStream = ConcatStream<T>([this, ...other]);
return isBroadcast
? concatStream.asBroadcastStream(onCancel: (s) => s.cancel())
: concatStream;
}