Expected returned value from getLargestTimeWindow in DefaultScorer

I was looking at the DefaultScorer to understand how it works, and I saw this function and wonder if we shouldn’t return timeWindow :

private TimeWindow getLargestTimeWindow(Activity act) {
        TimeWindow timeWindow = null;
        for (TimeWindow tw : act.getTimeWindows()) {
            if (timeWindow == null) timeWindow = tw;
            else if (tw.larger(timeWindow)) timeWindow = tw;
        }
        return TimeWindow.newInstance(0, Double.MAX_VALUE);
    }

Thanks