public void selectElements(ClassMember[] elements) {
   ArrayList<TreePath> selectionPaths = new ArrayList<TreePath>();
   for (ClassMember element : elements) {
     MemberNode treeNode = myElementToNodeMap.get(element);
     if (treeNode != null) {
       selectionPaths.add(new TreePath(((DefaultMutableTreeNode) treeNode).getPath()));
     }
   }
   myTree.setSelectionPaths(selectionPaths.toArray(new TreePath[selectionPaths.size()]));
 }
 @Nullable
 private File[] getFileArray() {
   ArrayList<File> result = new ArrayList<File>();
   TreePath[] selectionPaths = myTree.getSelectionPaths();
   if (selectionPaths != null) {
     for (TreePath selectionPath : selectionPaths) {
       AbstractTreeNode treeNode = (AbstractTreeNode) selectionPath.getLastPathComponent();
       result.addAll(treeNode.getFiles());
     }
   }
   if (result.isEmpty()) return null;
   return result.toArray(new File[result.size()]);
 }
  @Override
  public Configurable[] getConfigurables() {
    if (myConfigurables == null) {
      final ArrayList<Configurable> configurables = new ArrayList<Configurable>();
      for (LanguageInjectionSupport support : InjectorUtils.getActiveInjectionSupports()) {
        ContainerUtil.addAll(configurables, support.createSettings(myProject, myConfiguration));
      }
      Collections.sort(
          configurables,
          new Comparator<Configurable>() {
            public int compare(final Configurable o1, final Configurable o2) {
              return Comparing.compare(o1.getDisplayName(), o2.getDisplayName());
            }
          });
      myConfigurables = configurables.toArray(new Configurable[configurables.size()]);
    }

    return myConfigurables;
  }
  private void restoreSelection(Pair<ElementNode, List<ElementNode>> pair) {
    List<ElementNode> selectedNodes = pair.second;

    DefaultMutableTreeNode root = getRootNode();

    ArrayList<TreePath> toSelect = new ArrayList<TreePath>();
    for (ElementNode node : selectedNodes) {
      DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
      if (root.isNodeDescendant(treeNode)) {
        toSelect.add(new TreePath(treeNode.getPath()));
      }
    }

    if (!toSelect.isEmpty()) {
      myTree.setSelectionPaths(toSelect.toArray(new TreePath[toSelect.size()]));
    }

    ElementNode leadNode = pair.first;
    if (leadNode != null) {
      myTree.setLeadSelectionPath(new TreePath(((DefaultMutableTreeNode) leadNode).getPath()));
    }
  }