@class NSString, AVWeakReference, NSObject, AVCallbackContextRegistry;
@protocol AVWeakObservable;
@interface AVWeaklyObservedObjectClientBlockKVONotifier : NSObject <AVKVONotifier> {
AVCallbackContextRegistry *_callbackContextRegistry;
void *_callbackContextToken;
NSObject *_observer;
AVWeakReference *_weakReferenceToObject;
NSObject<AVWeakObservable> *_unsafeUnretainedObject;
NSString *_keyPath;
unsigned long long _options;
id /* block */ _block;
}
@property (readonly) unsigned long long hash;
@property (readonly) Class superclass;
@property (readonly, copy) NSString *description;
@property (readonly, copy) NSString *debugDescription;
- (void)cancelCallbacks;
- (void)dealloc;
- (void)start;
- (void)callbackDidFireWithChangeDictionary:(id)a0;
- (id)initWithCallbackContextRegistry:(id)a0 observer:(id)a1 object:(id)a2 keyPath:(id)a3 options:(unsigned long long)a4 block:(id /* block */)a5;
@end