internal _BroadcastSubscription(_StreamControllerLifecycle <T> controller, Action <T> onData, Action <object, string> onError, Action onDone, bool cancelOnError ) : base(controller, onData, onError, onDone, cancelOnError) { _next = _previous = this; }
internal _BroadcastStream(_StreamControllerLifecycle <T> controller) : base(controller) { }