Returns the concatentation of the input streams.
When the returned stream is listened to, the
streams are iterated through
asynchronously, forwarding all events (both data and error) for the current
stream to the returned stream before advancing the iterator and listening
to the next stream. If advancing the iterator throws an error, the
returned stream ends immediately with that error.
Pausing and resuming the returned stream's subscriptions will pause and resume the subscription of the current stream being listened to.
Note: Events from pre-existing broadcast streams which occur before the stream is reached by the iteration will be dropped.
concat(files.map((file) => file.openRead().transform(const LineSplitter())))
Stream<T> concat<T>(Iterable<Stream<T>> streams) => new _ConcatStream(streams);