Webform module and config export

web/modules/contrib/webform/src/WebformServiceProvider.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\webform;
+
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+use Drupal\Core\DependencyInjection\ServiceProviderBase;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Service Provider for Webform.
+ */
+class WebformServiceProvider extends ServiceProviderBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function alter(ContainerBuilder $container) {
+    $modules = $container->getParameter('container.modules');
+    if (isset($modules['hal'])) {
+      // Hal module is enabled, add our new normalizer for webform items.
+      $service_definition = new Definition('Drupal\webform\Normalizer\WebformEntityReferenceItemNormalizer', [
+        new Reference('rest.link_manager'),
+        new Reference('serializer.entity_resolver'),
+      ]);
+      // The priority must be higher than that of
+      // serializer.normalizer.entity_reference_item.hal in
+      // hal.services.yml.
+      $service_definition->addTag('normalizer', ['priority' => 20]);
+      $container->setDefinition('serializer.normalizer.webform_entity_reference_item', $service_definition);
+    }
+  }
+
+}