function _fieldInfoChanged(oFieldInfo, sMutation) {

		if (sMutation === "remove") {
			oFieldInfo.detachEvent("dataUpdate", _handleInfoDataUpdate, this);
		} else if (sMutation === "insert") {
			oFieldInfo.attachEvent("dataUpdate", _handleInfoDataUpdate, this);
			_handleInfoDataUpdate.call(this); // to set already existing values
		}

	}
Gets the icon that needs to be rendered for used value help.
@returns {sap.ui.core.URI|null} Icon