@class NSString; @protocol VSObservanceDelegate; @interface VSObservance : NSObject @property (nonatomic, getter=isObserving) BOOL observing; @property (readonly, nonatomic) id object; @property (readonly, copy, nonatomic) NSString *keyPath; @property (readonly, nonatomic) unsigned long long options; @property (weak, nonatomic) id<VSObservanceDelegate> delegate; - (void)startObserving; - (void)stopObserving; - (id)init; - (void)dealloc; - (id)initWithObject:(id)a0 keyPath:(id)a1 options:(unsigned long long)a2; - (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3; - (void).cxx_destruct; @end