DateGallerySubscriber<T> TYPE DEFINITION The subscriber which is informed of all state changes the DateGallery goes through. Since 1.6.0 Signature callback( DateGallery : DateGallery<T> , event : DateGallerySubscriberEvent<T> ): void Parameters DateGallery: DateGallery<T> The DateGallery which had changes. event: DateGallerySubscriberEvent<T> The event that occurred.