notificationSoundDefault#97e8bebe = NotificationSound;
notificationSoundNone#6f0c34df = NotificationSound;
notificationSoundLocal#830b9ae4 title:string data:string = NotificationSound;
notificationSoundRingtone#ff6c8049 id:long = NotificationSound;
Ни один метод не возвращает этот тип напрямую.