docs: public void combine(WSStatistic otherStat) {
          if (!validate(otherStat))
              return;
  
          CountStatisticImpl other = (CountStatisticImpl) otherStat;
          count += other.count;
  
          // Compare lastSampleTime
          if (other.lastSampleTime > lastSampleTime)
              lastSampleTime = other.lastSampleTime;
      }