@Override
	public void delete(Iterable<? extends Stream> entities) {
		for (Stream stream : entities) {
			delete(stream);
		}
	}
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