function add_page_and_update(
            $page_title,
            $menu_title,
            $capability,
            $menu_slug,
            $function = '',
            $icon_url = '',
            $position = null
        ) {
            $this->_menu_slug           = $menu_slug;
            $this->_is_top_level        = true;
            $this->_menu_exists         = true;
            $this->_network_menu_exists = true;

            return self::add_page(
                $page_title,
                $menu_title,
                $capability,
                $menu_slug,
                $function,
                $icon_url,
                $position
            );
        }