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vendor/symfony/mime/Part/Multipart/DigestPart.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mime\Part\Multipart;
+
+use Symfony\Component\Mime\Part\AbstractMultipartPart;
+use Symfony\Component\Mime\Part\MessagePart;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class DigestPart extends AbstractMultipartPart
+{
+    public function __construct(MessagePart ...$parts)
+    {
+        parent::__construct(...$parts);
+    }
+
+    public function getMediaSubtype(): string
+    {
+        return 'digest';
+    }
+}