@class NSMutableSet, NSObject; @protocol OS_dispatch_queue, OS_dispatch_source; @interface NTKDActivityTracker : NSObject { NSObject<OS_dispatch_queue> *_queue; NSMutableSet *_activityIdentifiers; NSObject<OS_dispatch_source> *_adjustCriteriaTimer; NSObject<OS_dispatch_source> *_removePostWakeActivityTimer; BOOL _xpcActivityRegistered; } + (id)sharedInstance; - (void)checkin; - (id)init; - (void)_queue_endActivity:(id)a0; - (void)endActivity:(id)a0; - (void)beginActivity:(id)a0; - (void)_queue_beginActivity:(id)a0; - (void).cxx_destruct; - (void)_queue_setOrUpdateActivityAndTimer; @end