diff --git a/StepByStep/WYSIWYG_EDITOR_IN_ANY_FORM.md b/StepByStep/WYSIWYG_EDITOR_IN_ANY_FORM.md
index ab5ef06..2ba199c 100644
--- a/StepByStep/WYSIWYG_EDITOR_IN_ANY_FORM.md
+++ b/StepByStep/WYSIWYG_EDITOR_IN_ANY_FORM.md
@@ -73,9 +73,8 @@ final class ProductTranslationTypeExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function getExtendedType(): string
-    {
-        return ProductTranslationType::class;
+    public static function getExtendedTypes(): iterable    {
+        return [ProductTranslationType::class];
     }
 }
 ```