code: function (container) {
          var self = this, html = '';
  
          self.applyClasses(container.items());
  
          container.items().each(function (item) {
            html += item.renderHtml();
          });
  
          return html;
        }
docs: Renders the specified container and any layout specific HTML.
  
  @method renderHtml
  @param {tinymce.ui.Container} container Container to render HTML for.