@class NSObject; @protocol OS_dispatch_queue; @interface CMIOExtensionProxyAttribution : NSObject { struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _lock; NSObject<OS_dispatch_queue> *_queue; } + (id)sharedAttribution; - (id)init; - (void)dealloc; - (void)addCameraAttribution:(id)a0; - (void)removeCameraAttribution:(id)a0; @end