[增添]添加了datasource的setting数据库以及默认值

vendor/symfony/mailer/Event/FailedMessageEvent.php

@@ -0,0 +1,37 @@
+<?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\Event;
+
+use Symfony\Component\Mime\RawMessage;
+use Symfony\Contracts\EventDispatcher\Event;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class FailedMessageEvent extends Event
+{
+    public function __construct(
+        private RawMessage $message,
+        private \Throwable $error,
+    ) {
+    }
+
+    public function getMessage(): RawMessage
+    {
+        return $this->message;
+    }
+
+    public function getError(): \Throwable
+    {
+        return $this->error;
+    }
+}