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    <h3>Editing: ImportConfigurator.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\RouteCollection;

/**
 * @author Nicolas Grekas &lt;p@tchwork.com&gt;
 */
class ImportConfigurator
{
    use Traits\HostTrait;
    use Traits\PrefixTrait;
    use Traits\RouteTrait;

    private RouteCollection $parent;

    public function __construct(RouteCollection $parent, RouteCollection $route)
    {
        $this-&gt;parent = $parent;
        $this-&gt;route = $route;
    }

    public function __sleep(): array
    {
        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
    }

    public function __wakeup()
    {
        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
    }

    public function __destruct()
    {
        $this-&gt;parent-&gt;addCollection($this-&gt;route);
    }

    /**
     * Sets the prefix to add to the path of all child routes.
     *
     * @param string|array $prefix the prefix, or the localized prefixes
     *
     * @return $this
     */
    final public function prefix(string|array $prefix, bool $trailingSlashOnRoot = true): static
    {
        $this-&gt;addPrefix($this-&gt;route, $prefix, $trailingSlashOnRoot);

        return $this;
    }

    /**
     * Sets the prefix to add to the name of all child routes.
     *
     * @return $this
     */
    final public function namePrefix(string $namePrefix): static
    {
        $this-&gt;route-&gt;addNamePrefix($namePrefix);

        return $this;
    }

    /**
     * Sets the host to use for all child routes.
     *
     * @param string|array $host the host, or the localized hosts
     *
     * @return $this
     */
    final public function host(string|array $host): static
    {
        $this-&gt;addHost($this-&gt;route, $host);

        return $this;
    }
}
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