addError method

@override void addError(Object o, [ StackTrace? st ])

As with add, but for adding errors.

Implementation

@override
void addError(Object o, [StackTrace? st]) {
  _lastAddedValue = ValueOrException.exc(o, st);
  if (!_sync && _controller.hasListener) {
    if (_controllerAddScheduled) return;
    _controllerAddScheduled = true;
    scheduleMicrotask(_controllerAddMicrotask);
  } else {
    _controllerAddMicrotask();
  }
}