code: function (domElt, id) {
              domElt.setAttribute(this.delegateExpando, id);
  
              // for iOS, refer to method getMarkup
              if (ariaCoreBrowser.isIOS) {
                  if (domElt.onclick == null) {
                      domElt.onclick = Aria.empty;
                  }
              }
          }
docs: Add the delegate expando on an existing dom element
  @param {HTMLElement} domElt
  @param {string} id