public static function genMainMenu()
 {
     Self::setMenu();
     $aryMenu = Static::$arrMainMenu;
     $menu = Menu::handler('mainmenu');
     foreach ($aryMenu as $lv1) {
         if (isset($lv1['childrens']) && !empty($lv1['childrens']) && is_array($lv1['childrens'])) {
             // With level 2
             $menuItems = Menu::items();
             foreach ($lv1['childrens'] as $lv2) {
                 $menuItems->add($lv2['url'], $lv2['rawContent']);
             }
             $menu->add($lv1['url'], $lv1['rawContent'], $menuItems, null, ['class' => 'treeview']);
         } else {
             $menu->add($lv1['url'], $lv1['rawContent']);
         }
     }
     /*$menu->add('dashboard', '<i class="fa fa-dashboard"></i> <span>Dashboard</span>')
       ->add('contacts', '<i class="fa fa-dashboard"></i> <span>Contact</span> <small class="badge pull-right bg-yellow">12</small>')
       ->add('#', '<i class="fa fa-calendar"></i> <span>Parent</span> <i class="fa fa-angle-left pull-right"></i>', Menu::items()
               // ->prefixParents()
               ->add('#', '<i class="fa fa-angle-double-right"></i>Menu 1')
               ->add('#', '<i class="fa fa-angle-double-right"></i>Menu 2')
               ->add('#', '<i class="fa fa-angle-double-right"></i>Menu 3')
           , null, [ 'class' => "treeview" ]
       )
       // ->raw(null, null, ['class' => 'divider'])
       ->add('inbox', '<i class="fa fa-envelope"></i> <span>Inbox</span>');*/
     //styling
     $menu->addClass('sidebar-menu')->getAllItemLists()->map(function ($item) {
         if ($item->isActive()) {
             $item->addClass('active');
         }
         if ($item->hasChildren()) {
             $item->addClass('treeview-menu');
         }
     });
     return $menu;
 }