@Override
	@Bean
	public StreamDefinitionRepository streamDefinitionRepository() {
		return new ZooKeeperStreamDefinitionRepository(zooKeeperConnection, moduleDependencyRepository());
	}
@author Gunnar Hillert
@author Glenn Renfro
@author Mark Fisher
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/rest/StreamsControllerIntegrationWithRepositoryTestsConfig.java