code: def preview_data_frame_transform(self, body, params=None):
          
          if body in SKIP_IN_PATH:
              raise ValueError("Empty value passed for a required argument 'body'.")
          return self.transport.perform_request(
              "POST", "/_data_frame/transforms/_preview", params=params, body=body
          )
docs: `<https://www.elastic.co/guide/en/elasticsearch/reference/current/preview-data-frame-transform.html>`_
  
          :arg body: The definition for the data_frame transform to preview