only in patch2:
unchanged:
--- a/core/modules/editor/editor.module
+++ b/core/modules/editor/editor.module
@@ -238,6 +238,9 @@ function editor_form_filter_admin_format_submit($form, FormStateInterface $form_
 /**
  * Loads an individual configured text editor based on text format ID.
  *
+ * @param int $format_id
+ *   A text format ID.
+ *
  * @return \Drupal\editor\Entity\Editor|null
  *   A text editor object, or NULL.
  */