code: @Override
      public Long sCard(byte[] key) {
          try {
              if (isPipelined()) {
                  pipeline(new JedisResult(pipeline.scard(key)));
                  return null;
              }
  
              return client.scard(key);
          } catch (Exception ex) {
              throw convertException(ex);
          }
      }
docs: /*
  @see org.springframework.data.redis.connection.RedisSetCommands#sCard(byte[])