code: protected final Split stopStopwatch() {
  		HandlerLocation location = threadLocation.get();
  		Split split = null;
  		if (location != null) {
  			split = location.getSplit();
  			split.stop();
  			location.setSplit(null);
  		}
  		return split;
  	}
docs: Stop current thread stopwatch (if any).
  
  @return Stopped split