@Override
	public <S extends Stream> Iterable<S> save(Iterable<S> entities) {
		// stream instances are "saved" when a StreamDeploymentListener deploys a stream
		return entities;
	}
Stream instance repository. It should only return values for Streams that are deployed.

@author Mark Fisher
@author Gunnar Hillert
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/stream/zookeeper/ZooKeeperStreamRepository.java