The source code

    /**
     * @ignore
     * popup menu render
     * @author yiminghe@gmail.com
     */
    KISSY.add("menu/popupmenu-render", function (S, extension, MenuRender) {

        var UA= S.UA;

        return MenuRender.extend([
            extension.ContentBox.Render,
            extension.Position.Render,
            UA['ie'] === 6 ? extension.Shim.Render : null
        ]);
    }, {
        requires:['component/extension', './menu-render']
    });