Fatal error: Uncaught Error: Class 'JsonMapperTest_DerivedClass' not found in /home/demo4ev/public_html/RAUSHAN/vendor/apimatic/jsonmapper/tests/JsonMapperTest/DerivedClass2.php:7 Stack trace: #0 {main} thrown in /home/demo4ev/public_html/RAUSHAN/vendor/apimatic/jsonmapper/tests/JsonMapperTest/DerivedClass2.php on line 7