docs: @Override
      public long getWorkerCount() {
          return PoolUtils.doWorkInPoolNicely(this.jedisPool, new PoolWork<Jedis, Long>() {
              /**
               * {@inheritDoc}
               */
              @Override
              public Long doWork(final Jedis jedis) throws Exception {
                  return jedis.scard(key(WORKERS));
              }
          });
      }