public void addDay(String weekNumber, String day, Boolean value) {
        Map<String, Boolean> existingInner = data.get(weekNumber);
        if (existingInner == null) {
            existingInner = new HashMap<String, Boolean>();
        }
        existingInner.put("day-" + day, value);

        data.put("week-" + weekNumber, existingInner);


    }