Initial Drupal 11 with DDEV setup

vendor/symfony/serializer/Mapping/Loader/LoaderChain.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\Serializer\Mapping\Loader;
+
+use Symfony\Component\Serializer\Exception\MappingException;
+use Symfony\Component\Serializer\Mapping\ClassMetadataInterface;
+
+/**
+ * Calls multiple {@link LoaderInterface} instances in a chain.
+ *
+ * This class accepts multiple instances of LoaderInterface to be passed to the
+ * constructor. When {@link loadClassMetadata()} is called, the same method is called
+ * in <em>all</em> of these loaders, regardless of whether any of them was
+ * successful or not.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+class LoaderChain implements LoaderInterface
+{
+    /**
+     * Accepts a list of LoaderInterface instances.
+     *
+     * @param LoaderInterface[] $loaders An array of LoaderInterface instances
+     *
+     * @throws MappingException If any of the loaders does not implement LoaderInterface
+     */
+    public function __construct(private readonly array $loaders)
+    {
+        foreach ($loaders as $loader) {
+            if (!$loader instanceof LoaderInterface) {
+                throw new MappingException(\sprintf('Class "%s" is expected to implement LoaderInterface.', get_debug_type($loader)));
+            }
+        }
+    }
+
+    public function loadClassMetadata(ClassMetadataInterface $metadata): bool
+    {
+        $success = false;
+
+        foreach ($this->loaders as $loader) {
+            $success = $loader->loadClassMetadata($metadata) || $success;
+        }
+
+        return $success;
+    }
+
+    /**
+     * @return LoaderInterface[]
+     */
+    public function getLoaders(): array
+    {
+        return $this->loaders;
+    }
+}