private static void loadAdditionalRoots(
     Element rootModelComponent, final String rootsTagName, final JpsUrlList result) {
   final Element roots = rootModelComponent.getChild(rootsTagName);
   for (Element root : JDOMUtil.getChildren(roots, ROOT_TAG)) {
     result.addUrl(root.getAttributeValue(URL_ATTRIBUTE));
   }
 }
 private static void saveAdditionalRoots(
     Element rootModelComponent, final String rootsTagName, final JpsUrlList list) {
   List<String> urls = list.getUrls();
   if (!urls.isEmpty()) {
     Element roots = new Element(rootsTagName);
     for (String url : urls) {
       roots.addContent(new Element(ROOT_TAG).setAttribute(URL_ATTRIBUTE, url));
     }
     rootModelComponent.addContent(roots);
   }
 }