From 1b104bbf748f2af0496897c98d5ded3ac545ed43 Mon Sep 17 00:00:00 2001
From: Dmitriy Simushev <JustBlackBird@yandex.ru>
Date: Fri, 25 Jan 2019 20:25:46 +0300
Subject: [PATCH] Add implementation of
 FormTypeExtensionInterface::getExtendedTypes (#1453)

This method is wanted by symfony >= 4.2 and will be required for
symfony >= 5.0

Fixes #1448
---
 Form/Extension/DocumentationExtension.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Form/Extension/DocumentationExtension.php b/Form/Extension/DocumentationExtension.php
index 2dcd1f9..a27d83d 100644
--- a/Form/Extension/DocumentationExtension.php
+++ b/Form/Extension/DocumentationExtension.php
@@ -34,6 +34,11 @@ class DocumentationExtension extends AbstractTypeExtension
 
     public function getExtendedType()
     {
-        return FormType::class;
+        return self::getExtendedTypes()[0];
+    }
+
+    public static function getExtendedTypes()
+    {
+        return [FormType::class];
     }
 }