diff -r 34716fd837a4 -r be944660c56a wp/wp-admin/includes/import.php
--- a/wp/wp-admin/includes/import.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-admin/includes/import.php	Wed Sep 21 18:19:35 2022 +0200
@@ -49,7 +49,7 @@
  * @param string   $name        Importer name and title.
  * @param string   $description Importer description.
  * @param callable $callback    Callback to run.
- * @return WP_Error Returns WP_Error when $callback is WP_Error.
+ * @return void|WP_Error Void on success. WP_Error when $callback is WP_Error.
  */
 function register_importer( $id, $name, $description, $callback ) {
 	global $wp_importers;