Are you sure?? widgetURL can't use for ControlWidget

Thank you very much! I do agree with you, but can you show some code snippets for me ?

I don't need a list of installed apps to use in my control widget, I just to achieve this interaction behavior. how should I config my control widget to support showing a list of some datasets for user to choose one and then show it in the control widget, could you show some code snippets?