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    <h3>Editing: UnsupportedSchemeException.php</h3>
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/*
 * 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\Exception;

use Symfony\Component\Translation\Bridge;
use Symfony\Component\Translation\Provider\Dsn;

class UnsupportedSchemeException extends LogicException
{
    private const SCHEME_TO_PACKAGE_MAP = [
        'crowdin' =&gt; [
            'class' =&gt; Bridge\Crowdin\CrowdinProviderFactory::class,
            'package' =&gt; 'symfony/crowdin-translation-provider',
        ],
        'loco' =&gt; [
            'class' =&gt; Bridge\Loco\LocoProviderFactory::class,
            'package' =&gt; 'symfony/loco-translation-provider',
        ],
        'lokalise' =&gt; [
            'class' =&gt; Bridge\Lokalise\LokaliseProviderFactory::class,
            'package' =&gt; 'symfony/lokalise-translation-provider',
        ],
    ];

    public function __construct(Dsn $dsn, ?string $name = null, array $supported = [])
    {
        $provider = $dsn-&gt;getScheme();
        if (false !== $pos = strpos($provider, '+')) {
            $provider = substr($provider, 0, $pos);
        }
        $package = self::SCHEME_TO_PACKAGE_MAP[$provider] ?? null;
        if ($package &amp;&amp; !class_exists($package['class'])) {
            parent::__construct(sprintf('Unable to synchronize translations via &quot;%s&quot; as the provider is not installed; try running &quot;composer require %s&quot;.', $provider, $package['package']));

            return;
        }

        $message = sprintf('The &quot;%s&quot; scheme is not supported', $dsn-&gt;getScheme());
        if ($name &amp;&amp; $supported) {
            $message .= sprintf('; supported schemes for translation provider &quot;%s&quot; are: &quot;%s&quot;', $name, implode('&quot;, &quot;', $supported));
        }

        parent::__construct($message.'.');
    }
}
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