Initial Drupal 11 with DDEV setup

vendor/symfony/serializer/Attribute/DiscriminatorMap.php

@@ -0,0 +1,65 @@
+<?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\Attribute;
+
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+
+/**
+ * @author Samuel Roze <samuel.roze@gmail.com>
+ */
+#[\Attribute(\Attribute::TARGET_CLASS)]
+class DiscriminatorMap
+{
+    /**
+     * @param string                      $typeProperty The property holding the type discriminator
+     * @param array<string, class-string> $mapping      The mapping between types and classes (i.e. ['admin_user' => AdminUser::class])
+     * @param ?string                     $defaultType  The fallback value if nothing specified by $typeProperty
+     *
+     * @throws InvalidArgumentException
+     */
+    public function __construct(
+        private readonly string $typeProperty,
+        private readonly array $mapping,
+        private readonly ?string $defaultType = null,
+    ) {
+        if (!$typeProperty) {
+            throw new InvalidArgumentException(\sprintf('Parameter "typeProperty" given to "%s" cannot be empty.', static::class));
+        }
+
+        if (!$mapping) {
+            throw new InvalidArgumentException(\sprintf('Parameter "mapping" given to "%s" cannot be empty.', static::class));
+        }
+
+        if (null !== $this->defaultType && !\array_key_exists($this->defaultType, $this->mapping)) {
+            throw new InvalidArgumentException(\sprintf('Default type "%s" given to "%s" must be present in "mapping" types.', $this->defaultType, static::class));
+        }
+    }
+
+    public function getTypeProperty(): string
+    {
+        return $this->typeProperty;
+    }
+
+    public function getMapping(): array
+    {
+        return $this->mapping;
+    }
+
+    public function getDefaultType(): ?string
+    {
+        return $this->defaultType;
+    }
+}
+
+if (!class_exists(\Symfony\Component\Serializer\Annotation\DiscriminatorMap::class, false)) {
+    class_alias(DiscriminatorMap::class, \Symfony\Component\Serializer\Annotation\DiscriminatorMap::class);
+}