code: function(oStep, sLabel){
  		var bIsExpandable = oStep.getParent() instanceof sap.ui.commons.RoadMap && oStep.getSubSteps().length > 0;
  
  		var sResult = sLabel || "";
  		if (oStep.getEnabled()) {
  			sResult = getText(bIsExpandable ? "RDMP_ARIA_EXPANDABLE_STEP" : "RDMP_ARIA_STANDARD_STEP", [sResult]);
  		}
  
  		return sResult;
  	}
docs: Computes how the aria-label property should be set for the given step