docs: def get_url_kwargs(self, request_kwargs=None, **kwargs):
          """
          If request_kwargs is not specified, self.kwargs is used instead.
  
          If 'object' is one of the kwargs passed. Replaces it with
          the value of 'self.slug_field' on the given object.
          """
  
          if not request_kwargs:
              request_kwargs = getattr(self, 'kwargs', {})
  
          kwargs = super(ModelCMSView, self).get_url_kwargs(request_kwargs,
                                                            **kwargs)
          obj = kwargs.pop('object', None)
          if obj:
              kwargs[self.slug_url_kwarg] = getattr(obj, self.slug_field, None)
          elif self.slug_url_kwarg in request_kwargs:
              kwargs[self.slug_url_kwarg] = request_kwargs[self.slug_url_kwarg]
  
          return kwargs