List of Admin Submenu Pages

I have been searching for a way to list the submenu pages of a top level admin menu added through a plugin. I couldn’t find a way to do so. However, I stumbled across a similar function in themes.php. I stripped it down a little bit to make it apply to less scenarios than those that themes.php apparently has to handle.

This is it:

function list_submenu_admin_pages($parent){
    global $submenu;
    if ( is_array( $submenu ) && isset( $submenu[$parent] ) ) {
        foreach ( (array) $submenu[$parent] as $item) {
            if ( $parent == $item[2] || $parent == $item[2] )
                continue;
            // 0 = name, 1 = capability, 2 = file
            if ( current_user_can($item[1]) ) {
                $menu_file = $item[2];
                if ( false !== ( $pos = strpos( $menu_file, '?' ) ) )
                    $menu_file = substr( $menu_file, 0, $pos );
                if ( file_exists( ABSPATH . "wp-admin/$menu_file" ) ) {
                    $options[] = "<a href='{$item[2]}'$class>{$item[0]}
                                  </a>";
                } else {
                    $options[] = "<a href='admin.php?page={$item[2]}'>
                                  {$item[0]}</a>";
                }
            }
        }
        return $options;
    }
}

Usage is just by passing the parent slug (the one added in the add_menu_page function).

If there is not a function like this in WP, should I submit this for review to be included in WP? Or am I wasting my time?