code: def _update_message_request(self, message):
          
          for each in self.row_keys:
              message.rows.row_keys.append(_to_bytes(each))
  
          for each in self.row_ranges:
              r_kwrags = each.get_range_kwargs()
              message.rows.row_ranges.add(**r_kwrags)
docs: Add row keys and row range to given request message
  
          :type message: class:`data_messages_v2_pb2.ReadRowsRequest`
          :param message: The ``ReadRowsRequest`` protobuf