Make FormatterInterface stub generic

Author: Niklan

stubs/Drupal/Core/Field/FormatterInterface.stub

@@ -2,14 +2,25 @@
 
 namespace Drupal\Core\Field;
 
+/**
+ * @template TFieldItemList of \Drupal\Core\Field\FieldItemListInterface
+ */
 interface FormatterInterface {
 
   /**
-   * @param \Drupal\Core\Field\FieldItemListInterface<\Drupal\Core\Field\FieldItemInterface> $items
+   * @param TFieldItemList $items
    * @param string $langcode
    *
    * @return array<int, array<int|string, mixed>>
    */
   public function viewElements(FieldItemListInterface $items, $langcode): array;
 
+  /**
+   * @param TFieldItemList $items
+   * @param string $langcode
+   *
+   * @return array<int|string, mixed>
+   */
+  public function view(FieldItemListInterface $items, $langcode = NULL);
+
 }