Collects the data of this stream in a List.
Source
Future<List<T>> toList() {
List<T> result = <T>[];
_Future<List<T>> future = new _Future<List<T>>();
this.listen(
(T data) {
result.add(data);
},
onError: future._completeError,
onDone: () {
future._complete(result);
},
cancelOnError: true);
return future;
}