@class NSPointerArray, NSObject; @protocol OS_dispatch_queue; @interface PUObserverRegistry : NSObject @property (readonly, nonatomic) NSPointerArray *_observers; @property (readonly, nonatomic) NSObject<OS_dispatch_queue> *_observerQueue; - (void)enumerateObserversWithBlock:(id /* block */)a0; - (id)init; - (void)registerObserver:(id)a0; - (void)unregisterObserver:(id)a0; - (void).cxx_destruct; @end