code: public static Timer getNamedTotalTimer(String timerName) {
  		long totalCpuTime = 0;
  		long totalSystemTime = 0;
  		int measurements = 0;
  		int timerCount = 0;
  		int todoFlags = RECORD_NONE;
  
  		Timer previousTimer = null;
  		for (Map.Entry<Timer, Timer> entry : registeredTimers.entrySet()) {
  			if (entry.getValue().name.equals(timerName)) {
  				previousTimer = entry.getValue();
  				timerCount += 1;
  				totalCpuTime += previousTimer.totalCpuTime;
  				totalSystemTime += previousTimer.totalWallTime;
  				measurements += previousTimer.measurements;
  				todoFlags |= previousTimer.todoFlags;
  			}
  		}
  
  		if (timerCount == 1) {
  			return previousTimer;
  		} else {
  			Timer result = new Timer(timerName, todoFlags, 0);
  			result.totalCpuTime = totalCpuTime;
  			result.totalWallTime = totalSystemTime;
  			result.measurements = measurements;
  			result.threadCount = timerCount;
  			return result;
  		}
  	}
docs: Collect the total times measured by all known named timers of the given
  name. This is useful to add up times that were collected across separate
  threads.
  
  @param timerName
  @return timer