code: def get_url_kwargs(self, request_kwargs=None, **kwargs):
          
  
          if not request_kwargs:
              request_kwargs = getattr(self, 'kwargs', {})
  
          for k in self.bundle.url_params:
              if k in request_kwargs and not k in kwargs:
                  kwargs[k] = request_kwargs[k]
          return kwargs
docs: Get the kwargs needed to reverse this url.
  
          :param request_kwargs: The kwargs from the current request. \
          These keyword arguments are only retained if they are present \
          in this bundle's known url_parameters.
          :param kwargs: Keyword arguments that will always be kept.