listen method
Implementation
@useResult
RemoveListener listen(void Function(AsyncPhase<T>) listener) {
// ignore: prefer_asserts_with_message
assert(ChangeNotifier.debugAssertNotDisposed(this));
_eventStreamController ??= StreamController<_Event<T>>.broadcast();
final subscription = _eventStreamController?.stream.listen((event) {
if (event.type != _EventType.end) {
listener(event.phase);
}
});
return () => subscription?.cancel();
}