How can I use route namespace?

I am creating routes in codeigniter-4 and I want to know if I can use namespace for some routes like with laravel given below:

Laravel namespace Code

Route::namespace('Admin')->group(function () {
    // Controllers Within The "AppHttpControllersAdmin" Namespace
});

Can I implement something similar in codeigniter-4 ?

My Codeigniter code

$routes->get('/admin', 'AdminController::index', ['filter' => 'auth']);
$routes->get('/admin/channels', 'ChannelController::index', ['filter' => 'auth']);

Answer

Yes you can.

$routes->group('api', ['namespace' => 'add your namespace here'], function($routes)
{
   $routes->get('/admin', 'AdminController::index', ['filter' => 
      'auth']);
}

https://codeigniter.com/user_guide/incoming/routing.html#assigning-namespace