Fatal error: Uncaught Error: Class "JsonMapperTest_DerivedClass" not found in /home/karendei/public_html/test.karenderia.ir/vendor/apimatic/jsonmapper/tests/JsonMapperTest/DerivedClass2.php:7 Stack trace: #0 {main} thrown in /home/karendei/public_html/test.karenderia.ir/vendor/apimatic/jsonmapper/tests/JsonMapperTest/DerivedClass2.php on line 7