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    <h3>Editing: ControllerEvent.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpKernel\Event;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\HttpKernelInterface;

/**
 * Allows filtering of a controller callable.
 *
 * You can call getController() to retrieve the current controller. With
 * setController() you can set a new controller that is used in the processing
 * of the request.
 *
 * Controllers should be callables.
 *
 * @author Bernhard Schussek &lt;bschussek@gmail.com&gt;
 */
final class ControllerEvent extends KernelEvent
{
    private $controller;

    public function __construct(HttpKernelInterface $kernel, callable $controller, Request $request, ?int $requestType)
    {
        parent::__construct($kernel, $request, $requestType);

        $this-&gt;setController($controller);
    }

    public function getController(): callable
    {
        return $this-&gt;controller;
    }

    public function setController(callable $controller): void
    {
        $this-&gt;controller = $controller;
    }
}
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