System/Library/PrivateFrameworks/EmailFoundation.framework

EFObserver.h

Download EFObserver.h

1. NSObject

@interface EFObserver : NSObject

+ (id)observerWithResultBlock:(id /* block */)a0 completionBlock:(id /* block */)a1 failureBlock:(id /* block */)a2;
+ (id)observerWithCompletionHandler:(id /* block */)a0;
+ (id)observerWithResultBlock:(id /* block */)a0;

@end