upgrade

vendor/symfony/dependency-injection/Tests/Fixtures/FactoryDummy.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\DependencyInjection\Tests\Fixtures;
+
+class FactoryDummy extends FactoryParent
+{
+    public static function createFactory(): FactoryDummy
+    {
+    }
+
+    public function create(): \stdClass
+    {
+    }
+
+    // Not supported by hhvm
+    public function createBuiltin(): int
+    {
+    }
+
+    public static function createSelf(): self
+    {
+    }
+
+    public static function createParent(): parent
+    {
+    }
+}
+
+class FactoryParent
+{
+}
+
+function factoryFunction(): FactoryDummy
+{
+}