NSLog a message when NSManagedObject Class's name is not as same as the entity's name in the CoreData Model.

I have a subclass of NSManageObject which have a prefix in the Class name, and an entity without the prefix in the CoreData Model. So when I try to run it, it crash, and I had no idea why is not working. The README do not have any clues about entity name, And I just simply forgot them.

This is a tiny NSLog when an NSEntityDescription object is nil. So we can figure out what's had happen when we meet the same problem as I do.