@interface TeaUI.PageSheetPresentationObserver : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ viewController;
    void /* unknown type, empty encoding */ isObserving;
    void /* unknown type, empty encoding */ onChange;
}

- (void)dismissalTransitionDidEndWithNotification:(id)a0;
- (void)presentationTransitionDidEndWithNotification:(id)a0;

@end