code: def bold_is_bright_toggled(self, settings, key, user_data):
          
          try:
              for term in self.guake.notebook_manager.iter_terminals():
                  term.set_bold_is_bright(settings.get_boolean(key))
          except:  # pylint: disable=bare-except
              log.error("set_bold_is_bright not supported by your version of VTE")
docs: If the dconf var bold_is_bright is changed, this method will be called
          and will change the VTE terminal to toggle auto-brightened bold text.