I want to use slightly different theme for pages which are not open to all, to give visual hint to users (editors) as to what kind of information they can put there (public/protected). Instead of defining separate page type I thought there surely must be simpler way, in form of PHP code to determine whether this page is visible to all or not. I don't mean user property isLoggedIn but page property to tell whether guests will be able to see it. Any hints?