simplify ref object

composer.json

@@ -50,7 +50,8 @@
         "phpunit/phpunit": "^9.6",
         "rregeer/phpunit-coverage-check": "^0.3.1",
         "spatie/phpunit-watcher": "^1.23",
-        "squizlabs/php_codesniffer": "^4.0"
+        "squizlabs/php_codesniffer": "^4.0",
+        "symfony/var-dumper": "^5.4"
     },
     "config": {
         "allow-plugins": {

src/core/Loader.php

@@ -18,7 +18,7 @@ class Loader
     /** @var array<string, array{class-string|callable(): object, array<int, mixed>, ?callable(object): void}> */
     protected array $classes = [];
 
-    /** @var array<string, object> Class instances */
+    /** @var array<string, object> */
     protected array $instances = [];
 
     /**
@@ -76,8 +76,7 @@ class Loader
             }
 
             if ($callback && (!$shared || !$exists)) {
-                $ref = [&$obj];
-                call_user_func_array($callback, $ref);
+                call_user_func_array($callback, [$obj]);
             }
         }