fix: Add style object

Closes #3504392

src/Plugin/UiPatterns/Source/MediaSource.php

@@ -65,12 +65,9 @@ class MediaSource extends SourcePluginBase {
 
     $media = $this->getMedia();
     if ($media === NULL) {
-     return '';
+      return '';
     }
     $view_mode = $this->getSetting('view_mode') ?? 'default';
-    if ($view_mode === NULL) {
-      return $media->id();
-    }
     $view_mode_builder = $this->entityTypeManager->getViewBuilder('media');
     return $view_mode_builder->view($media, $view_mode);
 
@@ -89,8 +86,10 @@ class MediaSource extends SourcePluginBase {
    */
   public function configureForm(array $form, FormStateInterface $form_state): array {
     $configuration = $this->getConfiguration();
+
     $form = parent::configureForm($form, $form_state);
-    /** @var \Drupal\media\Entity\MediaType $bundles */
+    // @phpstan-ignore-line
+    /** @var \Drupal\media\Entity\MediaType[] $bundles */
     $bundles = $this->entityTypeManager->getStorage('media_type')->loadMultiple();
     $bundle_options = [];
     foreach ($bundles as $bundle_id => $bundle) {
@@ -110,6 +109,7 @@ class MediaSource extends SourcePluginBase {
 
     return $form;
   }
+
   /**
    * {@inheritdoc}
    */