Actualización

vendor/symfony/dependency-injection/Loader/Configurator/InstanceofConfigurator.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\Loader\Configurator;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @method InstanceofConfigurator instanceof(string $fqcn)
+ */
+class InstanceofConfigurator extends AbstractServiceConfigurator
+{
+    const FACTORY = 'instanceof';
+
+    use Traits\AutowireTrait;
+    use Traits\CallTrait;
+    use Traits\ConfiguratorTrait;
+    use Traits\LazyTrait;
+    use Traits\PropertyTrait;
+    use Traits\PublicTrait;
+    use Traits\ShareTrait;
+    use Traits\TagTrait;
+
+    /**
+     * Defines an instanceof-conditional to be applied to following service definitions.
+     *
+     * @param string $fqcn
+     *
+     * @return self
+     */
+    final protected function setInstanceof($fqcn)
+    {
+        return $this->parent->instanceof($fqcn);
+    }
+}