api/java/src/main/java/com/navercorp/redis/cluster/spring/DefaultSessionOfHashSetOperations.java
public Set<HK> keys(H key) {
        final byte[] rawKey = rawKey(key);

        Set<byte[]> rawHashKeys = execute(new RedisCallback<Set<byte[]>>() {
            public Set<byte[]> doInRedis(RedisConnection connection) throws DataAccessException {
                return ((RedisClusterConnection) connection).ssKeys(rawKey);
            }
        }, true);

        return deserializeHashKeys(rawHashKeys);
    }
public Set<HK> keys(H key) {
        final byte[] rawKey = rawKey(key);

        Set<byte[]> rawHashKeys = execute(new RedisCallback<Set<byte[]>>() {
            public Set<byte[]> doInRedis(RedisConnection connection) throws DataAccessException {
                return ((RedisClusterConnection) connection).ssKeys(rawKey);
            }
        }, true);

        return deserializeHashKeys(rawHashKeys);
    }
/*
@see SessionOfHashSetOperations#keys(java.lang.Object)