@interface MusicUI.NotificationObserver : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ name;
    void /* unknown type, empty encoding */ object;
    void /* unknown type, empty encoding */ dispatchOnMainThread;
    void /* unknown type, empty encoding */ center;
    void /* unknown type, empty encoding */ handler;
}

- (void)handleNotification:(id)a0;

@end