code: function(rm, oRoadMap, oStep, bIsExpandable){
  		if (!sap.ui.getCore().getConfiguration().getAccessibility()) {
  			return;
  		}
  
  		rm.writeAttribute("role", "treeitem");
  
  		if (oStep.getEnabled()) {
  			rm.writeAttribute("aria-checked", oRoadMap.getSelectedStep() == oStep.getId());
  		} else {
  			rm.writeAttribute("aria-disabled", true);
  		}
  		rm.writeAttribute("aria-haspopup", bIsExpandable);
  		rm.writeAttribute("aria-level", oStep.getParent() instanceof sap.ui.commons.RoadMap ? 1 : 2);
  
  		rm.writeAttribute("aria-posinset", getAriaPosInSet(oStep));
  		rm.writeAttribute("aria-setsize", getAriaSetSize(oStep));
  		rm.writeAttributeEscaped("aria-label", getAriaLabel(oStep, oStep.getLabel()));
  
  		if (!bIsExpandable) {
  			return;
  		}
  
  		rm.writeAttribute("aria-expanded", oStep.getExpanded());
  	}
docs: Writes the ARIA properties of a step