Add @internal to renderer classes

Render/Html/GetNelmioAsset.php

@@ -14,6 +14,9 @@ namespace Nelmio\ApiDocBundle\Render\Html;
 use Symfony\Bridge\Twig\Extension\AssetExtension;
 use Twig\TwigFunction;
 
+/**
+ * @internal
+ */
 class GetNelmioAsset
 {
     private $assetExtension;

Render/Html/HtmlOpenApiRenderer.php

@@ -17,6 +17,9 @@ use Nelmio\ApiDocBundle\Render\RenderOpenApi;
 use OpenApi\Annotations\OpenApi;
 use Twig\Environment;
 
+/**
+ * @internal
+ */
 class HtmlOpenApiRenderer implements OpenApiRenderer
 {
     /** @var Environment|\Twig_Environment */

Render/Json/JsonOpenApiRenderer.php

@@ -15,6 +15,9 @@ use Nelmio\ApiDocBundle\Render\OpenApiRenderer;
 use Nelmio\ApiDocBundle\Render\RenderOpenApi;
 use OpenApi\Annotations\OpenApi;
 
+/**
+ * @internal
+ */
 class JsonOpenApiRenderer implements OpenApiRenderer
 {
     public function getFormat(): string

Render/OpenApiRenderer.php

@@ -13,6 +13,9 @@ namespace Nelmio\ApiDocBundle\Render;
 
 use OpenApi\Annotations\OpenApi;
 
+/**
+ * @internal
+ */
 interface OpenApiRenderer
 {
     public function getFormat(): string;

Render/Yaml/YamlOpenApiRenderer.php

@@ -15,6 +15,9 @@ use Nelmio\ApiDocBundle\Render\OpenApiRenderer;
 use Nelmio\ApiDocBundle\Render\RenderOpenApi;
 use OpenApi\Annotations\OpenApi;
 
+/**
+ * @internal
+ */
 class YamlOpenApiRenderer implements OpenApiRenderer
 {
     public function getFormat(): string