mtb_dcatadmin_plus/app/Admin/Controllers/TestController.php

<?php

namespace App\Admin\Controllers;

use App\Admin\Repositories\Test;
use App\Http\Controllers\Controller;
use Dcat\Admin\Form;
use Dcat\Admin\Grid;
use Dcat\Admin\Show;
use Carbon\Carbon;



class TestController extends Controller
{

    public function index()
    {
        echo '123';exit;
    }
}