code: def _set_sla_data(self, test_id, metrics):
      
      for metric in metrics:
        self._analyses[test_id].sla_data[metric.label] = metric.sla_map
      return CONSTANTS.OK
docs: Get sla data from each metric and set it in the _Analysis object specified by test_id to make it available
      for retrieval
      :return: currently always returns CONSTANTS.OK. Maybe enhanced in future to return additional status