Jedis can support varargs that takes multiple arguments to take the same operations. e.g. [SADD](https://redis.io/commands/sadd). In Jedis code: https://github.com/xetorthio/jedis/blob/master/src/main/java/redis/clients/jedis/Jedis.java#L1212
I think whether we could support this feature in sink connector? This will be very useful in terms of performance and flexiblity.
Didn't dive deep into implementation, but for interface wise, `RedisMapper::getValueFromData()` could return List<T>? Or a new Mapper.