@class NSString; @interface HMFKeyValueBlockObserver : HMFObject <HMFLogging> { struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _lock; BOOL _valid; BOOL _observing; } @property (readonly, copy) NSString *keyPath; @property (readonly, weak) id observedObject; @property (readonly) unsigned long long options; @property (copy) id /* block */ handler; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)logCategory; - (id)init; - (BOOL)__invalidate; - (void)dealloc; - (void)invalidate; - (id)logIdentifier; - (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3; - (void).cxx_destruct; - (id)initWithKeyPath:(id)a0 object:(id)a1 options:(unsigned long long)a2; - (id)initWithKeyPath:(id)a0 object:(id)a1; @end