public static void addLibraryChildren(final LibraryOrderEntry entry,
                                        final List<? super AbstractTreeNode<?>> children,
                                        Project project,
                                        ProjectViewNode<?> node) {
    final PsiManager psiManager = PsiManager.getInstance(project);
    final VirtualFile[] files = entry.getRootFiles(OrderRootType.CLASSES);
    for (final VirtualFile file : files) {
      final PsiDirectory psiDir = psiManager.findDirectory(file);
      if (psiDir == null) {
        continue;
      }
      children.add(new PsiDirectoryNode(project, psiDir, node.getSettings()));
    }
  }
public static void addLibraryChildren(final LibraryOrderEntry entry,
                                        final List<? super AbstractTreeNode<?>> children,
                                        Project project,
                                        ProjectViewNode<?> node)