/**
  * Get menu items.
  *
  * @param Role $role
  * @return array
  */
 protected function getMenuItems(Role $role)
 {
     $resources = $role->getRolesResources();
     $rootMenu = [];
     foreach ($resources as $resource) {
         $elements = explode('/', $resource);
         if (!in_array($elements[0], $rootMenu)) {
             $rootMenu[] = $elements[0];
         }
     }
     return $rootMenu;
 }