private void handleRecursively(DomainEventMessage event) {
handle(event);
Iterable<? extends EventSourcedEntity> childEntities = getChildEntities();
if (childEntities != null) {
for (EventSourcedEntity entity : childEntities) {
if (entity != null) {
entity.registerAggregateRoot(this);
entity.handleRecursively(event);
}
}
}
}