I've a CoreData base with some kind of object what are a subclass of
an abstract class called "root" (root is a subclass of
NSManagedObject). In a part of my code I need to catch all operation
on object what are a child of root. For do that I use the notification
NSManagedObjectContextObjectsDidChangeNotification and I would use
"isMemberOfClass" method for test each objet. I don't know why but
this method always return "NO" even of an object what are a chlid of
root...
