final DomainEventMessage<String> stubDomainEvent = new GenericDomainEventMessage<String>(
aggregateIdentifier,
(long) 30,
"Mock contents", MetaData.emptyInstance()
);
SnapshotEventEntry entry = new SnapshotEventEntry(
"test", stubDomainEvent,
serializer.serialize(stubDomainEvent.getPayload(), byte[].class),
serializer.serialize(stubDomainEvent.getMetaData(), byte[].class));
entityManager.persist(entry);
entityManager.flush();