Can I use blocks in asynchronous results with restkit?
@interface MyObjectLoaderDelegate : NSObject <RKObjectLoaderDelegate>

@property (nonatomic, copy) void (^callback)(RKObjectLoader *loader, NSDictionary *objectDictionary, NSError *error)

- (id)initWithCallback:(void (^)(RKObjectLoader*, NSDictionary*, NSError*)aCallaback;

@end