ICallback callback = new PageCallback(PAGE); page.setCallback(callback);  cycle.activate(page);
page.activatePageWithCallback(PAGE, cycle);
    public void editUser(IRequestCycle cycle) {        Integer userId = (Integer) TapestryUtils.assertParameter(Integer.class,                 cycle.getServiceParameters(), 0);                EditUser page = (EditUser) cycle.getPage(EditUser.PAGE);        page.setUserId(userId);        // When we navigate to the Edit User page, clicking OK or Cancel on that        // page should send the user back here        ICallback callback = new PageCallback(PAGE);        page.setCallback(callback);        cycle.activate(page);            }