@Override
  @Nullable
  protected JComponent createCenterPanel() {
    myModel = new StructureTreeModel<>(new MyStructure(getProject()), WeightBasedComparator.FULL_INSTANCE, myDisposable);
    myTree.setModel(new AsyncTreeModel(myModel, myDisposable));

    myTree.setDragEnabled(false);

    myTree.setShowsRootHandles(true);
    myTree.setRootVisible(false);
    myTree.addTreeSelectionListener(new TreeSelectionListener() {
      @Override
      public void valueChanged(final TreeSelectionEvent e) {
        updateOKAction();
      }
    });
    new DoubleClickListener() {
      @Override
      protected boolean onDoubleClick(@NotNull MouseEvent e) {
        if (isOKActionEnabled()) {
          doOKAction();
          return true;
        }
        return false;
      }
    }.installOn(myTree);

    myTree.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "ENTER");
    myTree.getActionMap().put("ENTER", getOKAction());
    final JScrollPane pane = ScrollPaneFactory.createScrollPane(myTree);
    pane.setPreferredSize(JBUI.size(500, 400));
    return pane;
  }
@Override
  @Nullable
  protected JComponent createCenterPanel()