@class NSMutableDictionary; @interface _PASNotificationTracker : NSObject { struct _opaque_pthread_mutex_t { long long __sig; char __opaque[56]; } _lock; unsigned long long _nextNotificationToken; NSMutableDictionary *_observers; } - (id)registerWithQueue:(id)a0 handler:(id /* block */)a1; - (id)init; - (void)dealloc; - (BOOL)_deregisterHandlerWithToken:(id)a0 waitOnPending:(BOOL)a1; - (void)issueNotificationAsyncWithContext:(id)a0 callback:(id /* block */)a1; - (void)issueNotificationAsyncWithContext:(id)a0; - (BOOL)deregisterHandlerAsyncWithToken:(id)a0; - (void).cxx_destruct; - (BOOL)deregisterHandlerWithToken:(id)a0; @end