void RemoveTimelineForEventType(EventType evtType)
{
EventTypeTimelineVM timeline = FindTimelineForEventType(evtType);
// If the timeline is empty and it does not have an associated dashboard
// button, get rid of it
if (!timeline.Any() && !eventTypes.Any(evt => evt.Model == evtType))
{
EventTypesTimeline.ViewModels.Remove(timeline);
timeline.Dispose();
eventTypeToTimeline.Remove(evtType);
}
}
