@Override
 public void registerContribution(
     Object contribution, String extensionPoint, ComponentInstance contributor) {
   if (EXTENSION_POINT_PATTERNS.equals(extensionPoint)) {
     PatternDescriptor patternDescriptor = (PatternDescriptor) contribution;
     registerPattern(patternDescriptor.getName(), patternDescriptor.getPattern());
   }
 }
 private DefaultMutableTreeNode createNode(@Nullable PatternDescriptor descriptor) {
   DefaultMutableTreeNode root =
       new DefaultMutableTreeNode(descriptor) {
         @NotNull
         @Override
         public String toString() {
           Object object = getUserObject();
           return object == null ? "" : ((PatternDescriptor) object).getName();
         }
       };
   String id = descriptor == null ? PatternDescriptor.ROOT : descriptor.getId();
   Collection<PatternDescriptor> collection = myMap.get(id);
   for (PatternDescriptor childDescriptor : collection) {
     root.add(createNode(childDescriptor));
   }
   return root;
 }
  public GenerateByPatternDialog(Project project, PatternDescriptor[] descriptors) {
    super(project);
    myProject = project;
    setTitle("Generate by Pattern");
    setOKButtonText("Generate");

    myMap = new MultiMap<>();
    for (PatternDescriptor descriptor : descriptors) {
      myMap.putValue(descriptor.getParentId(), descriptor);
    }
    DefaultMutableTreeNode root = createNode(null);

    myTree = new SimpleTree() {};

    myTree.setRootVisible(false);
    myTree.setCellRenderer(
        new DefaultTreeCellRenderer() {
          @NotNull
          @Override
          public Component getTreeCellRendererComponent(
              @NotNull JTree tree,
              Object value,
              boolean sel,
              boolean expanded,
              boolean leaf,
              int row,
              boolean hasFocus) {
            Component component =
                super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);

            Object object = ((DefaultMutableTreeNode) value).getUserObject();
            if (object instanceof PatternDescriptor) {
              setText(((PatternDescriptor) object).getName());
              setIcon(((PatternDescriptor) object).getIcon());
            }
            return component;
          }
        });

    myTree.setModel(new DefaultTreeModel(root));
    myTree
        .getSelectionModel()
        .addTreeSelectionListener(
            new TreeSelectionListener() {
              @Override
              public void valueChanged(@NotNull TreeSelectionEvent e) {
                update();
              }
            });
    myEditor = TemplateEditorUtil.createEditor(true, "");

    mySplitter.setFirstComponent(ScrollPaneFactory.createScrollPane(myTree));
    JPanel details = new JPanel(new BorderLayout());
    details.add(myEditor.getComponent(), BorderLayout.CENTER);
    mySplitter.setSecondComponent(details);
    mySplitter.setHonorComponentsMinimumSize(true);
    mySplitter.setShowDividerControls(true);

    myTree.setSelectionRow(0);

    init();
  }