Imagine a simple sports app model: League entity, with some id, name and displayOrder properties. It has a 1-many relationship to Event entity that has (among other attributes) id, name and of course — reverse to-one relationship back to League. You write a simple FetchRequest for FetchedResultsController when you are loading events grouped per league, with order defined by League.displayOrder but the section name (title) is League.name. To get the grouping with proper section titles, your ...
