Xcode 4 Core Data: How to use fetched property created in Data Model editor

Question

How do you implement a fetched property in Xcode 4?

Here is an example of two entities, a book and a page:

Answer 1

From what I've read you need to add fetched properties to the generated class yourself using the @dynamic keyword

// In your header
@property (nonatomic, retain) NSArray *fetchLastPage;

// In your class
@dynamic fetchLastPage;