public function &addDropDownSubmenu($name, $items)
    {
        $dropdown = $this->addItem(new \Ease\Html\UlTag(null,
                ['class' => 'dropdown-menu', 'role' => 'menu']));
        if (count($items)) {
            foreach ($items as $item) {
                $this->addMenuItem($item);
            }
        }

        return $dropdown;
    }