Issue #3376182 by robpowell, msielski, swirt: Drupal 10 event dispatcher changes order

src/Message.php

@@ -69,7 +69,7 @@ class Message {
 
       $event = new MessageEvent($message, $variables, $severity, $type, $parsed_message);
       $event_dispatcher = \Drupal::service('event_dispatcher');
-      $event_dispatcher->dispatch(MessageEvent::EVENT_NAME, $event);
+      $event_dispatcher->dispatch($event, MessageEvent::EVENT_NAME);
 
       $log_levels = RfcLogLevel::getLevels();
       /** @var \Drupal\Core\StringTranslation\TranslatableMarkup $log_function_markup */