docs: public void addRequest(long timeNS,
                             long numEmptyResponses,
                             long valueBytes,
                             long keyBytes,
                             long getAllAggregatedCount) {
          // timing instrumentation (trace only)
          long startTimeNs = 0;
          if(logger.isTraceEnabled()) {
              startTimeNs = System.nanoTime();
          }
  
          long currentTime = time.milliseconds();
  
          timeSensor.record((double) timeNS / voldemort.utils.Time.NS_PER_MS, currentTime);
          emptyResponseKeysSensor.record(numEmptyResponses, currentTime);
          valueBytesSensor.record(valueBytes, currentTime);
          keyBytesSensor.record(keyBytes, currentTime);
          getAllKeysCountSensor.record(getAllAggregatedCount, currentTime);
  
          // timing instrumentation (trace only)
          if(logger.isTraceEnabled()) {
              logger.trace("addRequest took " + (System.nanoTime() - startTimeNs) + " ns.");
          }
      }