code: def add_url_rule(self, rule, endpoint=None, view_func=None,
                       provide_automatic_options=None, register_with_babel=False,
                       **options):
          
          if self.unchained.babel_bundle and register_with_babel:
              self.unchained.babel_bundle.add_url_rule(
                  self, rule, endpoint=endpoint, view_func=view_func,
                  provide_automatic_options=provide_automatic_options, **options)
          return super().add_url_rule(rule, endpoint, view_func,
                                      provide_automatic_options, **options)
docs: Like :meth:`~flask.Flask.add_url_rule`, but if ``register_with_babel`` is True,
          then we also allow the Babel Bundle an opportunity to register a language code
          prefixed URL.