SafeHtmlBuilder sb = new SafeHtmlBuilder();
bufferRender(models, sb);
SafeHtml markup = sb.toSafeHtml();
getElement().setInnerHTML(markup.asString());
SafeHtmlBuilder esb = new SafeHtmlBuilder();
appearance.renderEnd(esb);
DomHelper.insertHtml("beforeend", getElement(), esb.toSafeHtml().asString());