Conding standards review

Conding standards review

Closes #3422897

src/Controller/EntityHolderController.php

@@ -44,6 +44,10 @@ class EntityHolderController extends ControllerBase {
   /**
    * EntityHolderController constructor.
    *
+   * @param \Symfony\Component\HttpKernel\HttpKernelInterface $http_kernel
+   *   The HTTP kernel.
+   * @param \Drupal\Core\Render\RendererInterface $renderer
+   *   The renderer service.
    * @param \Drupal\Core\Entity\EntityFormBuilderInterface $entity_form_builder
    *   The entity form builder.
    */
@@ -106,15 +110,22 @@ class EntityHolderController extends ControllerBase {
 
     return [
       '#markup' => $held_entity ? $held_entity->label() : $entity_holder->label(),
-      '#allowed_tags' => Xss::getHtmlTagList()
+      '#allowed_tags' => Xss::getHtmlTagList(),
     ];
   }
 
   /**
+   * Build response to entity holder path request.
    *
    * @param \Drupal\entity_holder\EntityHolderInterface $entity_holder
+   *   The entity holder.
+   *
+   * @return array
+   *   Render array of the held entity or fallback content.
    *
-   * @return array|mixed
+   * @throws \Symfony\Component\HttpFoundation\File\Exception\FileNotFoundException
+   *   If there is no held entity nor fallback content and the user cannot
+   *   create the hosted entity.
    */
   public function entityHolderView(EntityHolderInterface $entity_holder) {
     if ($held_entity = $entity_holder->getHeldEntity()) {