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vendor/nelmio/api-doc-bundle/PropertyDescriber/NullablePropertyDescriber.php

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+<?php
+
+/*
+ * This file is part of the NelmioApiDocBundle package.
+ *
+ * (c) Nelmio
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\ApiDocBundle\PropertyDescriber;
+
+use OpenApi\Annotations as OA;
+use OpenApi\Generator;
+
+final class NullablePropertyDescriber implements PropertyDescriberInterface, PropertyDescriberAwareInterface
+{
+    use PropertyDescriberAwareTrait;
+
+    public function describe(array $types, OA\Schema $property, array $groups = null, ?OA\Schema $schema = null, array $context = [])
+    {
+        if (Generator::UNDEFINED === $property->nullable) {
+            $property->nullable = true;
+        }
+
+        $this->propertyDescriber->describe($types, $property, $groups, $schema, $context);
+    }
+
+    public function supports(array $types): bool
+    {
+        foreach ($types as $type) {
+            if ($type->isNullable()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}