exitRoom method
Implementation
Future<TUIActionCallback> exitRoom(bool syncWaiting) {
String userData = Tools.generateUserData();
Completer<TUIActionCallback> completer = Completer();
_actionCallback2Future(userData, completer);
_engineSDK.Dart_ExitRoom(
_engineFFIPointer, syncWaiting, Tools.string2PointerChar(userData));
return completer.future;
}