api/java/src/main/java/com/navercorp/redis/cluster/RedisCluster.java
public Long zadd(final String key, final double score, final String member) {
        client.zadd(key, score, member);
        return client.getIntegerReply();
    }
public Long zadd(final String key, final double score, final String member) {
        client.zadd(key, score, member);
        return client.getIntegerReply();
    }
Sorted Sets