@class NSString, BSAbstractDefaultDomain, NSArray, NSObject; @protocol OS_dispatch_queue; @interface _BSDefaultObserver : NSObject <BSDefaultObserver> { BSAbstractDefaultDomain *_defaults; NSObject<OS_dispatch_queue> *_queue; NSArray *_defaultsToObserve; id /* block */ _fireBlock; BOOL _invalidated; _Atomic unsigned int _debounceCounter; } @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; @end