code: def menu_text(self, request=None):
          
          source_field_name = settings.PAGE_FIELD_FOR_MENU_ITEM_TEXT
          if(
              source_field_name != 'menu_text' and
              hasattr(self, source_field_name)
          ):
              return getattr(self, source_field_name)
          return self.title
docs: Return a string to use as link text when this page appears in
          menus.