Vaadin 23 and ONE ROUTE for All Access Denied Exceptions

Question

I have Vaadin 23 app. I want ONE ROUTE for all errors/exceptions and especially for all ACCESS DENIED exceptions.... how can I accimplish that withough refefinding

@Override
public void beforeEnter(BeforeEnterEvent event) {

from BeforeEnterObserver interface?

It used to be that you cold define with a tag an error route for a page... now I cannot find it

I di not want to have to redefine

@Override public void beforeEnter(BeforeEnterEvent event) {

in every BeforeEnterObserver interface. this is too much clutter