addSimpleMsgListener method

Future<String> addSimpleMsgListener(
  1. {required V2TimSimpleMsgListener listener}
)

Implementation

Future<String> addSimpleMsgListener({
  required V2TimSimpleMsgListener listener,
}) {
  if (v2TimSimpleMsgListenerList.contains(listener)) {
    return Future.value('error: listener already exists');
  }

  v2TimSimpleMsgListenerList.add(listener);
  return Future.value('add success');
}