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    <h3>Editing: LocaleSwitcher.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\Translation;

use Symfony\Component\Routing\RequestContext;
use Symfony\Contracts\Translation\LocaleAwareInterface;

/**
 * @author Kevin Bond &lt;kevinbond@gmail.com&gt;
 */
class LocaleSwitcher implements LocaleAwareInterface
{
    private string $defaultLocale;

    /**
     * @param LocaleAwareInterface[] $localeAwareServices
     */
    public function __construct(
        private string $locale,
        private iterable $localeAwareServices,
        private ?RequestContext $requestContext = null,
    ) {
        $this-&gt;defaultLocale = $locale;
    }

    public function setLocale(string $locale): void
    {
        \Locale::setDefault($this-&gt;locale = $locale);
        $this-&gt;requestContext?-&gt;setParameter('_locale', $locale);

        foreach ($this-&gt;localeAwareServices as $service) {
            $service-&gt;setLocale($locale);
        }
    }

    public function getLocale(): string
    {
        return $this-&gt;locale;
    }

    /**
     * Switch to a new locale, execute a callback, then switch back to the original.
     *
     * @template T
     *
     * @param callable():T $callback
     *
     * @return T
     */
    public function runWithLocale(string $locale, callable $callback): mixed
    {
        $original = $this-&gt;getLocale();
        $this-&gt;setLocale($locale);

        try {
            return $callback();
        } finally {
            $this-&gt;setLocale($original);
        }
    }

    public function reset(): void
    {
        $this-&gt;setLocale($this-&gt;defaultLocale);
    }
}
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