code: def get_data_frame_transform_stats(self, transform_id=None, params=None):
          
          return self.transport.perform_request(
              "GET",
              _make_path("_data_frame", "transforms", transform_id, "_stats"),
              params=params,
          )
docs: `<https://www.elastic.co/guide/en/elasticsearch/reference/current/get-data-frame-transform-stats.html>`_
  
          :arg transform_id: The id of the transform for which to get stats.
              '_all' or '*' implies all transforms