code: @Override
  	public void onSimonCreated(Simon simon) {
  		if (simon instanceof Stopwatch) {
  			simon.setAttribute(timelineAttributeName, new StopwatchTimeline(timelineCapacity, timeRangeWidth));
  		}
  	}
docs: On simon creation a timeline attribute is added (for Stopwatches only).
  
  @param simon created simon