Neos\Flow\Persistence\Doctrine\Mapping\Driver\FlowAnnotationDriver::isTransient PHP Method

    public function isTransient($className)
    {
        return strpos($className, Compiler::ORIGINAL_CLASSNAME_SUFFIX) !== false || !$this->reflectionService->isClassAnnotatedWith($className, Flow\Entity::class) && !$this->reflectionService->isClassAnnotatedWith($className, Flow\ValueObject::class) && !$this->reflectionService->isClassAnnotatedWith($className, ORM\Entity::class) && !$this->reflectionService->isClassAnnotatedWith($className, ORM\MappedSuperclass::class) && !$this->reflectionService->isClassAnnotatedWith($className, ORM\Embeddable::class);
    }