Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in E:\apps\docPhp\git\phpDocumentor\tests\data\extensions\example\Extension.php:10 Stack trace: #0 {main} thrown in E:\apps\docPhp\git\phpDocumentor\tests\data\extensions\example\Extension.php on line 10