@Override
        protected FileTemplateNode initModel() {
          SortedSet<FileTemplateGroupDescriptor> categories =
            new TreeSet<>(Comparator.comparing(FileTemplateGroupDescriptor::getTitle));

          for (FileTemplateGroupDescriptorFactory templateGroupFactory : factories) {
            ContainerUtil.addIfNotNull(categories, templateGroupFactory.getFileTemplatesDescriptor());
          }

          return new FileTemplateNode("ROOT", null, ContainerUtil.map(categories, FileTemplateNode::new));
        }
@Override
        protected FileTemplateNode initModel()