function buildIconAttributes(oButton) {
		var oAttributes = {},
			sTooltip = oButton.getTooltip_AsString();

		oAttributes["id"] = oButton.getId() + "-icon";
		if (sTooltip) { // prevents default icon tooltip

			oAttributes["title"] = null;
			oAttributes["aria-label"] = null;
			oAttributes["aria-hidden"] = true;
		}
		return oAttributes;
	}
@private
@param {sap.ui.commons.Button} oButton The button to be rendered
@returns {Object} Icon attributes