code: function (domElt) {
              this.$Frame.linkToDom.call(this, domElt);
              this._childRootElt = this._verticalAlignApplied ?
                  ariaUtilsDom.getDomElementChild(domElt, 0) :
                  domElt;
          }
docs: Link this frame to a DOM element after the markup has been inserted in the DOM.
  @param {HTMLElement} domElt The DOM element which corresponds to the first item inserted by the
  writeMarkupBegin method.