Initial Drupal 11 with DDEV setup

vendor/symfony/mailer/Exception/TransportException.php

@@ -0,0 +1,30 @@
+<?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\Mailer\Exception;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class TransportException extends RuntimeException implements TransportExceptionInterface
+{
+    private string $debug = '';
+
+    public function getDebug(): string
+    {
+        return $this->debug;
+    }
+
+    public function appendDebug(string $debug): void
+    {
+        $this->debug .= $debug;
+    }
+}