@interface _UIKBUndoGestureObserver : UIGestureRecognizer + (id)undoGestureObserverWithTarget:(id)a0 action:(SEL)a1 delegate:(id)a2; - (BOOL)canPreventGestureRecognizer:(id)a0; - (BOOL)_affectedByGesture:(id)a0; - (BOOL)_analyticsIsGestureHandled; - (void)touchesCancelled:(id)a0 withEvent:(id)a1; - (BOOL)canBePreventedByGestureRecognizer:(id)a0; - (void)touchesEnded:(id)a0 withEvent:(id)a1; - (void)_failOrCancelIfNecessary; @end