@class NSString, NSNotificationCenter, NSMutableSet, NSHashTable; @interface NUExtensionAppActivityMonitor : NSObject <NUAppActivityMonitor> @property (readonly, nonatomic) NSNotificationCenter *notificationCenter; @property (readonly, nonatomic) NSHashTable *observers; @property (readonly, nonatomic) NSMutableSet *foregroundObserverBlocks; @property (readonly, nonatomic) NSMutableSet *backgroundObserverBlocks; @property (readonly, nonatomic) NSMutableSet *windowForegroundObserverBlocks; @property (readonly, nonatomic) NSMutableSet *windowBackgroundObserverBlocks; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (void)performOnApplicationDidEnterBackground:(id /* block */)a0; - (void)dealloc; - (void)removeObserver:(id)a0; - (void)performOnApplicationDidBecomeActive:(id /* block */)a0; - (void)performOnApplicationWindowDidBecomeForeground:(id /* block */)a0; - (id)initWithNotificationCenter:(id)a0; - (void)performOnApplicationWillEnterForeground:(id /* block */)a0; - (void).cxx_destruct; - (void)performOnApplicationWindowDidBecomeBackground:(id /* block */)a0; - (void)addObserver:(id)a0; - (void)applicationDidEnterBackgroundNotification:(id)a0; - (void)applicationWillEnterForegroundNotification:(id)a0; @end