private @NotNull JComponent toUsageViewToolbar(@NotNull DefaultActionGroup group) {
    ThreadingAssertions.assertEventDispatchThread();
    ActionToolbar actionToolbar = ActionManager.getInstance().createActionToolbar(ActionPlaces.USAGE_VIEW_TOOLBAR, group, false);
    actionToolbar.setTargetComponent(myRootPanel);
    return actionToolbar.getComponent();
  }
private @NotNull JComponent toUsageViewToolbar(@NotNull DefaultActionGroup group)