Check for a string first to pass the condition quicker

src/Model/Behavior/DuplicatableBehavior.php

@@ -292,7 +292,7 @@ protected function _doAction($action, EntityInterface $entity, $prop, $value = n
                 break;
 
             case 'set':
-                if (is_callable($value) && !is_string($value)) {
+                if (!is_string($value) && is_callable($value)) {
                     $value = $value($entity);
                 }
                 $entity->set($prop, $value);