code: public Long expire(H key, long timeout, TimeUnit unit) {
          final byte[] rawKey = rawKey(key);
          final long expireSeconds = unit.toSeconds(timeout);
  
          return execute(new RedisCallback<Long>() {
              public Long doInRedis(RedisConnection connection) throws DataAccessException {
                  return ((RedisClusterConnection) connection).ssExpire(rawKey, expireSeconds);
              }
          }, true);
      }
docs: /*
  @see SessionOfHashSetOperations#expire(java.lang.Object, long, java.util.concurrent.TimeUnit)