function add_subpage_and_update(
            $parent_slug,
            $page_title,
            $menu_title,
            $capability,
            $menu_slug,
            $function = ''
        ) {
            $this->_menu_slug           = $menu_slug;
            $this->_parent_slug         = $parent_slug;
            $this->_is_top_level        = false;
            $this->_menu_exists         = true;
            $this->_network_menu_exists = true;

            return self::add_subpage(
                $parent_slug,
                $page_title,
                $menu_title,
                $capability,
                $menu_slug,
                $function
            );
        }