code: function () {
  				var oIconTabHeaderItems = this.getItems(),
  					iAriaPointSet = 1,
  					oItemDom;
  
  				oIconTabHeaderItems.forEach(function (oItem) {
  					oItemDom = oItem.getDomRef();
  					if (oItemDom && oItemDom.getAttribute("aria-posinset") !== null) {
  						oItemDom.setAttribute("aria-posinset", iAriaPointSet++);
  					}
  				});
  			}
docs: Recalculates and sets the correct aria-posinset attribute value.
  @private