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vendor/symfony/dependency-injection/Loader/Configurator/Traits/SyntheticTrait.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\Traits;
+
+trait SyntheticTrait
+{
+    /**
+     * Sets whether this definition is synthetic, that is not constructed by the
+     * container, but dynamically injected.
+     *
+     * @param bool $synthetic
+     *
+     * @return $this
+     */
+    final public function synthetic($synthetic = true)
+    {
+        $this->definition->setSynthetic($synthetic);
+
+        return $this;
+    }
+}