Collections.sort(calendarWrappers, KalendarComparator.getInstance());
Collections.sort(importedCalendarWrappers, KalendarComparator.getInstance());
List<KalendarRenderWrapper> allCalendarWrappers = new ArrayList<KalendarRenderWrapper>(calendarWrappers);
allCalendarWrappers.addAll(importedCalendarWrappers);
weeklyCalendar = new WeeklyCalendarComponent("weeklyCalendar", allCalendarWrappers, 7, getTranslator());
weeklyCalendar.addListener(this);
// subscription, see OLAT-3861
SubscriptionProvider provider = new SubscriptionProviderImpl(caller, calendarWrappers.get(0));
subsContext = provider.getSubscriptionContext();