code: def check_all_local_prep(self):
          
          all_local_pp_chk = self.event['global']['all_local_prep'].isChecked()
          for buttons in self.event['local'].values():
              if buttons[1].isEnabled():
                  buttons[1].setChecked(all_local_pp_chk)
docs: Check or uncheck all enabled event pre-processing.