add method
Add a specific StateXController to this View. Returns the StateXController's unique String identifier.
Implementation
@override
String add(StateXController? controller) {
if (controller != null) {
/// It may have been a listener. Can't be both.
removeListener(controller);
// todo: Delete this along with _controllers. Proven hazardous.
/// Collect all the Controllers to the 'root' State object;
rootState?._controllers.add(controller);
}
return super.add(controller);
}