subscribeNext method
Subscribes to this SyncEventLine with a priority
which defaults to
EventPriority.normal for one event.
Implementation
Future<T> subscribeNext({int priority = EventPriority.normal}) async {
var completer = Completer<T>();
var subscription =
subscribe((p0) => completer.complete(p0), priority: priority);
var result = await completer.future;
unsubscribe(subscription);
return result;
}