public Long zaddnx(String key, double score, String member) {
        ZAddParams params = ZAddParams.zAddParams().nx();
        return jedisCommands.zadd(key, score, member, params);
    }
Proxy for the {@link JedisCommands} object.
redis-persistence/src/main/java/com/netflix/conductor/redis/jedis/JedisProxy.java