@NotNull
  protected JComponent createToolbar() {
    DefaultActionGroup toolbarGroups = new DefaultActionGroup();
    myToolBarGroup = new DefaultActionGroup();
    toolbarGroups.add(myToolBarGroup);
    buildToolBar(myToolBarGroup);

    toolbarGroups.addSeparator();
    DefaultActionGroup treeActionsGroup = new DefaultActionGroup();
    toolbarGroups.add(treeActionsGroup);
    for (AnAction action : myViewer.getTreeActions()) {
      treeActionsGroup.add(action);
    }

    ActionToolbar toolbar =
        ActionManager.getInstance().createActionToolbar(ActionPlaces.TOOLBAR, toolbarGroups, true);
    toolbar.setTargetComponent(this);
    return toolbar.getComponent();
  }