How to install when lines referenced in the README don't exist?

[jerrac]

In Symfony 6.3, my kernel.php looks like this:

<?php

namespace App;

use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;

class Kernel extends BaseKernel
{
    use MicroKernelTrait;
}

The foreach loop referenced in the readme is not there.

So, how do I get the plugin installed?

Or is this plugin not compatible with Symfony 6 yet?