Initial Drupal 11 with DDEV setup

vendor/symfony/service-contracts/Attribute/Required.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\Contracts\Service\Attribute;
+
+/**
+ * A required dependency.
+ *
+ * This attribute indicates that a property holds a required dependency. The annotated property or method should be
+ * considered during the instantiation process of the containing class.
+ *
+ * @author Alexander M. Turek <me@derrabus.de>
+ */
+#[\Attribute(\Attribute::TARGET_METHOD | \Attribute::TARGET_PROPERTY)]
+final class Required
+{
+}

vendor/symfony/service-contracts/Attribute/SubscribedService.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\Contracts\Service\Attribute;
+
+use Symfony\Contracts\Service\ServiceMethodsSubscriberTrait;
+use Symfony\Contracts\Service\ServiceSubscriberInterface;
+
+/**
+ * For use as the return value for {@see ServiceSubscriberInterface}.
+ *
+ * @example new SubscribedService('http_client', HttpClientInterface::class, false, new Target('githubApi'))
+ *
+ * Use with {@see ServiceMethodsSubscriberTrait} to mark a method's return type
+ * as a subscribed service.
+ *
+ * @author Kevin Bond <kevinbond@gmail.com>
+ */
+#[\Attribute(\Attribute::TARGET_METHOD)]
+final class SubscribedService
+{
+    /** @var object[] */
+    public array $attributes;
+
+    /**
+     * @param string|null       $key        The key to use for the service
+     * @param class-string|null $type       The service class
+     * @param bool              $nullable   Whether the service is optional
+     * @param object|object[]   $attributes One or more dependency injection attributes to use
+     */
+    public function __construct(
+        public ?string $key = null,
+        public ?string $type = null,
+        public bool $nullable = false,
+        array|object $attributes = [],
+    ) {
+        $this->attributes = \is_array($attributes) ? $attributes : [$attributes];
+    }
+}