code: def btn_clicked(self, widget, data=None):
          
          self.kwargs['subassistant_0'] = self.get_current_main_assistant().name
          self.kwargs['subassistant_1'] = data
          if 'subassistant_2' in self.kwargs:
              del self.kwargs['subassistant_2']
          self._open_path_window()
docs: Function is used for case that assistant does not have any
          subassistants