docs: function () {
              var domElt = this.getDom();
              var actingDom = aria.utils.Dom.getDomElementChild(domElt, 0);
  
              if (actingDom) {
                  this._frame.linkToDom(actingDom);
              }
  
              aria.widgets.container.Tab.superclass._init.call(this);
          }