@Override
  protected JComponent createCenterPanel() {
    JPanel panel = new JPanel(new BorderLayout());

    // Toolbar

    DefaultActionGroup group = new DefaultActionGroup();

    fillToolbarActions(group);

    group.addSeparator();

    ExpandAllAction expandAllAction = new ExpandAllAction();
    expandAllAction.registerCustomShortcutSet(getActiveKeymapShortcuts(IdeActions.ACTION_EXPAND_ALL), myTree);
    group.add(expandAllAction);

    CollapseAllAction collapseAllAction = new CollapseAllAction();
    collapseAllAction.registerCustomShortcutSet(getActiveKeymapShortcuts(IdeActions.ACTION_COLLAPSE_ALL), myTree);
    group.add(collapseAllAction);

    ActionToolbar toolbar = ActionManager.getInstance().createActionToolbar("MemberChooser", group, true);
    toolbar.setTargetComponent(myTree);
    panel.add(toolbar.getComponent(), BorderLayout.NORTH);

    // Tree
    expandFirst();
    defaultExpandTree();
    installSpeedSearch();

    JScrollPane scrollPane = ScrollPaneFactory.createScrollPane(myTree);
    scrollPane.setPreferredSize(JBUI.size(350, 450));
    panel.add(scrollPane, BorderLayout.CENTER);

    return panel;
  }
@Override
  protected JComponent createCenterPanel()