Fatal error: Uncaught Error: Class 'Illuminate\Contracts\Database\ModelIdentifier' not found in /home/nixap/ddd.nixap.space/vendor/darryldecode/cart/tests/helpers/MockProduct.php:6 Stack trace: #0 {main} thrown in /home/nixap/ddd.nixap.space/vendor/darryldecode/cart/tests/helpers/MockProduct.php on line 6