code: @Override
      public void renderHead(final Component _component,
                             final IHeaderResponse _response)
      {
          super.renderHead(_component, _response);
          final StringBuilder js = new StringBuilder()
              .append("ready(function() {")
              .append("registry.byId(\"").append(_component.getMarkupId())
              .append("\").set(\"content\", domConstruct.create(\"iframe\", {");
  
          if (this.frameMarkupId != null) {
              js.append("\"id\": \"").append(this.frameMarkupId).append("\",");
          }
  
          js.append("\"src\": \"").append(_component.urlForListener(new PageParameters()))
              .append("\",\"style\": \"border: 0; width: 100%; height: 99%\", \"nodeId\": \"jan\"")
              .append("}));")
              .append("});");
          _response.render(JavaScriptHeaderItem.forScript(DojoWrapper.require(js, DojoClasses.ready,
                          DojoClasses.registry, DojoClasses.domConstruct), _component.getMarkupId() + "-Script"));
      }
docs: Render the links for the head.
  
  @param _component component the header will be rendered for
  @param _response resonse to add