Fatal error: Uncaught Error: Class 'Magento\Framework\Api\AbstractSimpleObject' not found in /home/esecureh/public_html/magdemo/dev/tests/integration/_files/Magento/TestModuleExtensionAttributes/Model/FakeAttributeMetadata.php:13 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/integration/_files/Magento/TestModuleExtensionAttributes/Model/FakeAttributeMetadata.php on line 13