FILE_EXISTS_REPLACE and file_prepare_directory() is removed from Drupal 10 must be replaced

I have uploaded a patch for the issue.
Please review.
Thanks!

 				if (((int) \Drupal::VERSION) < 9) {
-					if (file_prepare_directory($location, FILE_CREATE_DIRECTORY)) {
+					if (\Drupal::service('file_system')->prepareDirectory($location, FileSystemInterface::CREATE_DIRECTORY)) {
 						$files = file_unmanaged_copy($droot . '/themes/moksu/content/' . $alias . '.html.twig', $location);
 						$test = rename($droot . '/themes/moksu/templates/' . $alias . '.html.twig', $droot . '/themes/moksu/templates/page--node--' . $node->id() . '.html.twig');
 					}

Since that function is called only with Drupal 8 (See the if (((int) \Drupal::VERSION) < 9) { control statement that wraps those lines) that is fine.
Since the same branch aims to work with Drupal 8 and Drupal 9, that is the only possibility.