Fatal error: Uncaught Error: Class 'Magento\Framework\Api\AbstractExtensibleObject' not found in /home/esecureh/public_html/magdemo/dev/tests/integration/_files/Magento/TestModuleExtensionAttributes/Model/FakeCustomer.php:14 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/integration/_files/Magento/TestModuleExtensionAttributes/Model/FakeCustomer.php on line 14