test mixed property

tests/Functional/ModelDescriber/Fixtures/TypeInfo/MixedTypes.json

@@ -0,0 +1,8 @@
+{
+    "properties": {
+        "mixedAnnotation": {
+            "nullable": true
+        }
+    },
+    "type": "object"
+}

tests/Functional/ModelDescriber/Fixtures/TypeInfo/MixedTypes.php

@@ -0,0 +1,20 @@
+<?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\Tests\Functional\ModelDescriber\Fixtures\TypeInfo;
+
+class MixedTypes
+{
+    /**
+     * @var mixed
+     */
+    public $mixedAnnotation;
+}

tests/Functional/ModelDescriber/ObjectModelDescriberTestTypeInfo.php

@@ -46,5 +46,9 @@ public static function provideFixtures(): \Generator
         yield [
             Fixtures\TypeInfo\ArrayMixedKeys::class
         ];
+
+        yield [
+            Fixtures\TypeInfo\MixedTypes::class
+        ];
     }
 }