code: def get_index_url(self, resource=None, **kwargs):
          
          default_kwargs = self.default_kwargs_for_urls() \
              if resource == self.get_resource_name() else {}
  
          default_kwargs.update(kwargs)
  
          return self.get_full_url(
              self.app.reverse(
                  '{}_index'.format(resource or self.get_resource_name()),
                  **default_kwargs
              )
          )
docs: Builds the url of the resource's index.
  
          :param resource: name of the resource or None
          :param kwargs: additional keyword arguments to build the url
          :return: url of the resource's index