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    <h3>Editing: RoutingConfigurator.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\Routing\Loader\Configurator;

use Symfony\Component\Routing\Loader\PhpFileLoader;
use Symfony\Component\Routing\RouteCollection;

/**
 * @author Nicolas Grekas &lt;p@tchwork.com&gt;
 */
class RoutingConfigurator
{
    use Traits\AddTrait;

    private PhpFileLoader $loader;
    private string $path;
    private string $file;
    private ?string $env;

    public function __construct(RouteCollection $collection, PhpFileLoader $loader, string $path, string $file, string $env = null)
    {
        $this-&gt;collection = $collection;
        $this-&gt;loader = $loader;
        $this-&gt;path = $path;
        $this-&gt;file = $file;
        $this-&gt;env = $env;
    }

    /**
     * @param string|string[]|null $exclude Glob patterns to exclude from the import
     */
    final public function import(string|array $resource, string $type = null, bool $ignoreErrors = false, string|array $exclude = null): ImportConfigurator
    {
        $this-&gt;loader-&gt;setCurrentDir(\dirname($this-&gt;path));

        $imported = $this-&gt;loader-&gt;import($resource, $type, $ignoreErrors, $this-&gt;file, $exclude) ?: [];
        if (!\is_array($imported)) {
            return new ImportConfigurator($this-&gt;collection, $imported);
        }

        $mergedCollection = new RouteCollection();
        foreach ($imported as $subCollection) {
            $mergedCollection-&gt;addCollection($subCollection);
        }

        return new ImportConfigurator($this-&gt;collection, $mergedCollection);
    }

    final public function collection(string $name = ''): CollectionConfigurator
    {
        return new CollectionConfigurator($this-&gt;collection, $name);
    }

    /**
     * Get the current environment to be able to write conditional configuration.
     */
    final public function env(): ?string
    {
        return $this-&gt;env;
    }

    final public function withPath(string $path): static
    {
        $clone = clone $this;
        $clone-&gt;path = $clone-&gt;file = $path;

        return $clone;
    }
}
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