def update_latest_col_ts(self, bch, obj_uuid):
    try:
        self._cassandra_driver.get_one_col(datastore_api.OBJ_UUID_CF_NAME, obj_uuid, 'type')
    except NoIdError:
        return
    self._cassandra_driver.insert(obj_uuid, {'META:latest_col_ts': JSON_NONE}, batch=bch)
def update_latest_col_ts(self, bch, obj_uuid):
    try:
        self._cassandra_driver.get_one_col(datastore_api.OBJ_UUID_CF_NAME, obj_uuid, 'type')
    except NoIdError:
        return
    self._cassandra_driver.insert(obj_uuid, {'META:latest_col_ts': JSON_NONE}, batch=bch)