emit method

Implementation

@internal
void emit(T event) {
  // check if already disposed
  if (isDisposed) {
    logger.warning('failed to emit event ${event} on a disposed emitter');
    return;
  }
  // queue mode
  if (_queueMode) {
    _queue.add(event);
    return;
  }
  // emit the event
  streamCtrl.add(event);
}