Issue #3470405 by TR: [10.3] Convert FieldFormatter plugin from annotation to attributes

Closes #3470405

src/Plugin/Field/FieldFormatter/VotingApiFormatter.php

@@ -2,11 +2,13 @@
 
 namespace Drupal\votingapi_widgets\Plugin\Field\FieldFormatter;
 
+use Drupal\Core\Field\Attribute\FieldFormatter;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Field\FormatterBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
 use Drupal\votingapi\VoteResultFunctionManager;
 use Drupal\votingapi_widgets\Plugin\VotingApiWidgetManager;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -22,6 +24,13 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   }
  * )
  */
+#[FieldFormatter(
+  id: 'voting_api_formatter',
+  label: new TranslatableMarkup('Voting API formatter'),
+  field_types: [
+    'voting_api_field',
+  ],
+)]
 class VotingApiFormatter extends FormatterBase implements ContainerFactoryPluginInterface {
 
   /**