code: function(rm, oRoadMap, oStep){
  		var fCreateIcon = function(rm, oRoadMap, sId, sIcon, sAdditonalClass){
  			rm.write("<div");
  			rm.writeAttribute("id", sId + "-ico");
  			rm.addClass("sapUiRoadMapStepIco");
  			if (sAdditonalClass) {
  				rm.addClass(sAdditonalClass);
  			}
  			rm.writeClasses();
  			rm.write("></div>");
  		};
  
  		var bIsExpanded = oStep.getExpanded();
  
  		//Render the start step with an additional icon
  		renderStep(rm, oRoadMap, oStep, bIsExpanded ? ["sapUiRoadMapExpanded"] : null, function(rm, oRoadMap, oStep){
  			fCreateIcon(rm, oRoadMap, oStep.getId(), bIsExpanded ? "roundtripstart.gif" : "roundtrip.gif");
  		});
  
  		//Render the sub steps
  		var aSteps = oStep.getSubSteps();
  		for (var i = 0; i < aSteps.length; i++) {
  			var aClasses = ["sapUiRoadMapSubStep"];
  			if (!bIsExpanded && aSteps[i].getVisible()) {
  				aClasses.push("sapUiRoadMapHidden");
  			}
  			renderStep(rm, oRoadMap, aSteps[i], aClasses);
  		}
  
  		//Render the end step with an additional icon
  		aClasses = ["sapUiRoadMapExpanded", "sapUiRoadMapStepEnd"];
  		if (!bIsExpanded) {
  			aClasses.push("sapUiRoadMapHidden");
  		}
  		renderStep(rm, oRoadMap, oStep, aClasses, function(rm, oRoadMap, oStep){
  			fCreateIcon(rm, oRoadMap, oStep.getId() + "-expandend", "roundtripend.gif");
  		}, oStep.getId() + "-expandend");
  	}
docs: Writes the step HTML of the expandable step and its children into the rendermanger