I have a ViewModel that has a list of "ScheduleItems" (custom appointments) which is set as the AppointmentSource on my ScheduleView.
When I update a single (custom) property on a ScheduleItem - I need to effectively loop through all the appointments on the same resource and decide whether I need to update a property on them too based on another factor - but I do not have access to the ScheduleItems/AppointmentsSource list from my single ScheduleItem?