public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) {
GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());
StartEvent startEvent = (StartEvent) flowNode;
if (startEvent.getEventDefinitions() != null && !startEvent.getEventDefinitions().isEmpty()) {
EventDefinition eventDefinition = startEvent.getEventDefinitions().get(0);
if (eventDefinition instanceof TimerEventDefinition) {
processDiagramCanvas.drawTimerStartEvent(graphicInfo, scaleFactor);
} else if (eventDefinition instanceof ErrorEventDefinition) {
processDiagramCanvas.drawErrorStartEvent(graphicInfo, scaleFactor);
} else if (eventDefinition instanceof SignalEventDefinition) {