@class NSMutableDictionary; @interface NTKSyncedAlbumObserver : NSObject { NSMutableDictionary *_deviceAlbumObservers; struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _observersLock; } + (id)sharedInstance; - (id)init; - (void).cxx_destruct; - (void)addObserver:(id)a0 forDevice:(id)a1; - (void)removeObserver:(id)a0 forDevice:(id)a1; - (id)syncedAlbumNameForDevice:(id)a0; @end