mtb_dcatadmin_plus/app/Distributor/Repositories/SiteMenu.php

<?php

namespace App\Distributor\Repositories;

use Dcat\Admin\Traits\ModelTree;
use App\Models\SiteMenu as Model;
use Dcat\Admin\Repositories\EloquentRepository;

class SiteMenu extends EloquentRepository
{

    /**
     * Model.
     *
     * @var string
     */
    protected $eloquentClass = Model::class;

    public static function selectOptions(\Closure $closure = null)
    {
        if (!$closure) {
            $closure = function ($query) {
                $query =  $query->orderBy('order', 'asc');
                return $query;
            };
        }

        $selectOptions =  Model::class::selectOptions($closure);
        return $selectOptions;
    }

}