I have a NSManagedObject subclass (Parent) that has an ordered to-many relationship with another NSManagedObject subclass (Child). I require Parent to use KVO to watch a value on the Child(ren) held in its NSOrderedSet. This means I need to manually add and remove the Parent as an observer when a Child is added-to or removed-from the set. This means I need to implement my own accessors for the NSOrderedSet.
Where can I see what these accessors should look like?