void updateServiceList(TreeNode parentNode, Device device) {
ServiceList serviceList = device.getServiceList();
int nServices = serviceList.size();
for (int n = 0; n < nServices; n++) {
Service service = serviceList.getService(n);
String serviceType = service.getServiceType();
TreeNode serviceNode = new TreeNode(serviceType);
serviceNode.setUserData(service);
parentNode.add(serviceNode);
updateActionList(serviceNode, service);
updateStateVariableList(serviceNode, service);
}
}