docs: @Override
      public long getPendingCount() {
          final List<String> queueNames = getQueueNames();
          return PoolUtils.doWorkInPoolNicely(this.jedisPool, new PoolWork<Jedis, Long>() {
              /**
               * {@inheritDoc}
               */
              @Override
              public Long doWork(final Jedis jedis) throws Exception {
                  long pendingCount = 0L;
                  for (final String queueName : queueNames) {
                      pendingCount += size(jedis, queueName);
                  }
                  return pendingCount;
              }
          });
      }