Fatal error: Uncaught Error: Class "pvc\struct\collection\IndexedCollection" not found in I:\www\pvcStruct\tests\integration_tests\fixture\tree_indexed\collection\TreenodeCollection.php:13 Stack trace: #0 {main} thrown in I:\www\pvcStruct\tests\integration_tests\fixture\tree_indexed\collection\TreenodeCollection.php on line 13