Issue #3352469 by simgui8: Add theme suggestion for the email-wrap.html.twig template

symfony_mailer.module

@@ -39,6 +39,13 @@ function symfony_mailer_theme_suggestions_email(array $variables) {
   return array_slice($variables['email']->getSuggestions('email', '__'), 1);
 }
 
+/**
+ * Implements hook_theme_suggestions_HOOK() for email_wrap.
+ */
+function symfony_mailer_theme_suggestions_email_wrap(array $variables) {
+  return array_slice($variables['email']->getSuggestions('email_wrap', '__'), 1);
+}
+
 /**
  * Implements hook_mailer_builder_info_alter().
  */