code: public List<Event> getApp(int appId, LocalDate dateFrom, LocalDate dateTo,
  			ReferenceType... types) {
  		return getCalendar("app/" + appId, dateFrom, dateTo, null, types);
  	}
docs: Returns the items and tasks that are related to the given app.
  
  @param appId
  The id of the app
  @param dateFrom
  The from date
  @param dateTo
  The to date
  @param types
  The types of events that should be returned. Leave out to get
  all types of events.
  @return The events in the calendar