docs: function () {
              var domElt = this.getDom();
              var curIndex = 0;
              if (this._cfg.waiAria) {
                  this._focusElt = aria.utils.Dom.getDomElementChild(domElt, curIndex);
                  curIndex++;
              } else {
                  this._focusElt = domElt;
              }
              var frameDom = aria.utils.Dom.getDomElementChild(domElt, curIndex);
  
              if (frameDom) {
                  this._frame.linkToDom(frameDom);
              }
  
              this.$Container._init.call(this);
          }