@class NSMutableDictionary; @interface CKVOBlockHelper : NSObject @property (readonly, weak, nonatomic) id observedObject; @property (readonly, nonatomic) NSMutableDictionary *tokensByContext; @property (nonatomic) long long nextIdentifier; - (id)initWithObject:(id)a0; - (id)allKVOObservers; - (void)removeHandlerForKey:(id)a0; - (void)dump; - (void)dealloc; - (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3; - (void).cxx_destruct; - (id)debugDescription; - (id)insertNewTokenForKeyPath:(id)a0 block:(id /* block */)a1; @end