@class NSMutableDictionary, NSObject;
@protocol OS_dispatch_queue;
@interface AVCallbackContextRegistry : NSObject {
NSMutableDictionary *_contextsForTokens;
unsigned long long _currentToken;
NSObject<OS_dispatch_queue> *_readWriteQueue;
}
+ (void)initialize;
+ (id)sharedCallbackContextRegistry;
- (id)init;
- (void)dealloc;
- (void)unregisterCallbackContextForToken:(void *)a0;
- (id)callbackContextForToken:(void *)a0;
- (void *)registerCallbackContextObject:(id)a0;
@end