Fatal error: Uncaught Error: Class 'JMS\Serializer\Metadata\ClassMetadata' not found in /home/itrave/dev.etravel.cm/api2/vendor/jms/serializer/tests/Metadata/Driver/php/Discriminator.ObjectWithXmlAttributeDiscriminatorParent.php:5 Stack trace: #0 {main} thrown in /home/itrave/dev.etravel.cm/api2/vendor/jms/serializer/tests/Metadata/Driver/php/Discriminator.ObjectWithXmlAttributeDiscriminatorParent.php on line 5