/**
  * Constructs a new <code>DefaultRedisSortedSet</code> instance.
  *
  * @param key
  * @param operations
  * @param defaultScore
  */
 public DefaultRedisZSet(String key, RedisOperations<String, E> operations, double defaultScore) {
   super(key, operations);
   boundZSetOps = operations.boundZSetOps(key);
   this.defaultScore = defaultScore;
 }