@Override
  protected JComponent createNorthPanel() {
    final DefaultActionGroup group = new DefaultActionGroup();
    final TreeExpander expander = new DefaultTreeExpander(myTree);
    final CommonActionsManager actionsManager = CommonActionsManager.getInstance();
    group.add(actionsManager.createExpandAllAction(expander, myTree));
    group.add(actionsManager.createCollapseAllAction(expander, myTree));
    final JComponent component = ActionManager.getInstance().createActionToolbar(ActionPlaces.PROJECT_VIEW_TOOLBAR, group, true).getComponent();
    component.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.darkGray), component.getBorder()));
    return component;
  }
@Override
  protected JComponent createNorthPanel()