onListen property

ControllerCallback onListen

The callback which is called when the stream is listened to.

May be set to null, in which case no callback will happen.

Implementation

@override
ControllerCallback get onListen => _controller.onListen;

void onListen= (void onListenHandler())

Implementation

@override
set onListen(void Function() onListenHandler) {
  _controller.onListen = onListenHandler;
}