@interface PassKitUI.KeyboardObserver : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ _isVisible;
    void /* unknown type, empty encoding */ _keyboardHeight;
}

- (void)keyboardWillShowWithNotification:(id)a0;
- (void)keyboardWillHideWithNotification:(id)a0;
- (void)keyboardDidHideWithNotification:(id)a0;
- (void)keyboardWillChangeFrameWithNotification:(id)a0;

@end