实现请求缓存1天。

vendor/symfony/var-exporter/Exception/ClassNotFoundException.php

@@ -0,0 +1,20 @@
+<?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\VarExporter\Exception;
+
+class ClassNotFoundException extends \Exception implements ExceptionInterface
+{
+    public function __construct(string $class, ?\Throwable $previous = null)
+    {
+        parent::__construct(sprintf('Class "%s" not found.', $class), 0, $previous);
+    }
+}