code: public synchronized void onRequestSucceeded(long startTimeInNanos) {
  		long micros = (System.nanoTime() - startTimeInNanos) / 1000;
  		allRequestsTracker.onRequestSucceeded(micros);
  		recentRequestsTracker.onRequestSucceeded(micros);
  		meter.mark();
  	}
docs: Registers the successful completion of execution of request.
  
  @param startTimeInNanos
  The start-time of execution, in nanoseconds.