@class NSString, AFKeyValueObservingDeliveryOptions, AFOneArgumentSafetyBlock; @interface AFKeyValueObserver : NSObject <AFKeyValueObserving> { _Atomic BOOL _isInvalid; AFOneArgumentSafetyBlock *_invalidation; id /* block */ _handler; AFKeyValueObservingDeliveryOptions *_deliveryOptions; } @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (void)dealloc; - (void)invalidate; - (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3; - (void).cxx_destruct; - (void)_handleObservedChangeWithOldValue:(id)a0 andNewValue:(id)a1; - (id)initWithObject:(id)a0 keyPath:(id)a1 handler:(id /* block */)a2 deliveryOptions:(id)a3; @end