@class NSHashTable; @interface MTDBExtensionAccess : NSObject { NSHashTable *_observers; BOOL _hasAttemptedToFix; } + (id)sharedInstance; - (void)_handleChange; - (void)_startObserving; - (BOOL)isReady; - (id)init; - (void)dealloc; - (void)removeObserver:(id)a0; - (void)attemptToFix; - (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3; - (void).cxx_destruct; - (void)addObserver:(id)a0; - (void)_stopObserving; @end