code: function(oRoadMap, bLast){
  		var iScrollWidth = oRoadMap.$("steparea").get(0).scrollWidth;
  		if (sap.ui.getCore().getConfiguration().getRTL() && Device.browser.webkit) {
  			return bLast ? 0 : ( -1) * iScrollWidth;
  		}
  		return bLast ? iScrollWidth : 0;
  	}
docs: Calculates the position of the fisrt/last step (with fix for Safari in RTL mode) to make the position and scroll calculations running (see comment on getRTLFactor for RTL behavior)