code: @Override
      public Boolean persist(byte[] key) {
          try {
              if (isPipelined()) {
                  pipeline(new JedisResult(pipeline.persist(key), JedisConverters.longToBoolean()));
                  return null;
              }
  
              return JedisConverters.toBoolean(client.persist(key));
          } catch (Exception ex) {
              throw convertException(ex);
          }
      }
docs: /*
  @see org.springframework.data.redis.connection.RedisKeyCommands#persist(byte[])