addError method
Sends or enqueues an error event.
Listeners receive this event at a later microtask. This behavior can be
overridden by using sync
controllers. Note, however, that sync
controllers have to satisfy the preconditions mentioned in the
documentation of the constructors.
Implementation
@override
void addError(Object error, [StackTrace? stackTrace]) {
if (_streamController != null) {
_streamController!.addError(error, stackTrace);
}
}