docs: def add_or_update_records(cls, tables: I2B2Tables, records: List["ObservationFact"]) -> Tuple[int, int]:
          """
          Add or update the observation_fact table as needed to reflect the contents of records
          :param tables: i2b2 sql connection
          :param records: records to apply
          :return: number of records added / modified
          """
          return cls._add_or_update_records(tables.crc_connection, tables.observation_fact, records)