public void setMenuIcons(ImageIcon normal, ImageIcon selected) {
        if (normal != null) {
            for (AccordionRootItem menu : getMenus()) {
                menu.setNormalIcon(normal);
            }
        }
        if (selected != null) {
            for (AccordionRootItem menu : getMenus()) {
                menu.setSelectedIcon(selected);
            }
        }
        updateLeafs();
    }