Doctrine\OXM\Tools\XmlEntityGenerator::getChangeTrackingPolicyString PHP Method

    private function getChangeTrackingPolicyString($policy)
    {
        switch ($policy) {
            case ClassMetadataInfo::CHANGETRACKING_DEFERRED_IMPLICIT:
                return 'DEFERRED_IMPLICIT';
            case ClassMetadataInfo::CHANGETRACKING_DEFERRED_EXPLICIT:
                return 'DEFERRED_EXPLICIT';
            case ClassMetadataInfo::CHANGETRACKING_NOTIFY:
                return 'NOTIFY';
            default:
                throw new \InvalidArgumentException('Invalid provided ChangeTrackingPolicy: ' . $policy);
        }
    }