[ObjectMapper] Condition to target a specific class

Author: soyuka

Tests/Fixtures/ObjectMapper/TransformCallable.php

@@ -18,7 +18,7 @@
  */
 final class TransformCallable implements TransformCallableInterface
 {
-    public function __invoke(mixed $value, object $object): mixed
+    public function __invoke(mixed $value, object $source, ?object $target): mixed
     {
         return 'transformed';
     }