'Return the retention policy.'

def get_policy(self):

    try:
        LOG.debug('Searching    for    retention_policy    in    K2.')
        return self.client.search('retention_policies', name='Best_Effort_Retention').hits[0]
    except Exception as ex:
        LOG.exception('Retention    policy    search    failed    in    K2.')
        raise exception.KaminarioCinderDriverException(reason=ex)
