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vendor/symfony/routing/Loader/Configurator/AliasConfigurator.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\Routing\Loader\Configurator;
+
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\Routing\Alias;
+
+class AliasConfigurator
+{
+    private Alias $alias;
+
+    public function __construct(Alias $alias)
+    {
+        $this->alias = $alias;
+    }
+
+    /**
+     * Whether this alias is deprecated, that means it should not be called anymore.
+     *
+     * @param string $package The name of the composer package that is triggering the deprecation
+     * @param string $version The version of the package that introduced the deprecation
+     * @param string $message The deprecation message to use
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException when the message template is invalid
+     */
+    public function deprecate(string $package, string $version, string $message): static
+    {
+        $this->alias->setDeprecated($package, $version, $message);
+
+        return $this;
+    }
+}