Devise\Menus\MenusRepository::getAllowedMenuItemsFromMenu PHP Method

    private function getAllowedMenuItemsFromMenu($menu)
    {
        $menuItems = new Collection();
        foreach ($menu->items as $menuItem) {
            $items = $this->getAllowedMenuItems($menuItem);
            if ($items) {
                $menuItems[] = $items;
            }
        }
        return $menuItems;
    }