Actualización

vendor/symfony/http-kernel/Tests/Fixtures/ExtensionLoadedBundle/DependencyInjection/ExtensionLoadedExtension.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\HttpKernel\Tests\Fixtures\ExtensionLoadedBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+
+class ExtensionLoadedExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+    }
+}

vendor/symfony/http-kernel/Tests/Fixtures/ExtensionLoadedBundle/ExtensionLoadedBundle.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\HttpKernel\Tests\Fixtures\ExtensionLoadedBundle;
+
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+class ExtensionLoadedBundle extends Bundle
+{
+}