I'm trying to integrate role scope in another plugin (Collapsing pages) to only write out the menu items that users have rights to read by role scope. I'm stucked where I need to define if the user have rights or not. Is there a good way to determine this?

…
foreach( $pages as $page ) {
if( the user have rights to read this post )
continue;  

…
add to menu
… 
}