Added Project structure, API, Frontend and Websockets

api/vendor/symfony/http-kernel/RebootableInterface.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel;
+
+/**
+ * Allows the Kernel to be rebooted using a temporary cache directory.
+ *
+ * @author Nicolas Grekas <[email protected]>
+ */
+interface RebootableInterface
+{
+    /**
+     * Reboots a kernel.
+     *
+     * The getBuildDir() method of a rebootable kernel should not be called
+     * while building the container. Use the %kernel.build_dir% parameter instead.
+     *
+     * @param string|null $warmupDir pass null to reboot in the regular build directory
+     */
+    public function reboot(?string $warmupDir): void;
+}