Fatal error: Uncaught Error: Class "UsingTraits\SimpleProduct" not found in C:\xampp\htdocs\swagger\vendor\zircote\swagger-php\Examples\using-traits\TrickyProduct.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\swagger\vendor\zircote\swagger-php\Examples\using-traits\TrickyProduct.php on line 11