code: public static StandaloneLeaderRetrievalService createLeaderRetrievalService(Configuration configuration)
  		throws ConfigurationException, UnknownHostException {
  		return createLeaderRetrievalService(
  			configuration,
  			false,
  			null);
  	}
docs: Creates a {@link StandaloneLeaderRetrievalService} from the given configuration. The
  host and port for the remote Akka URL are retrieved from the provided configuration.
  
  @param configuration Configuration instance containing the host and port information
  @return StandaloneLeaderRetrievalService
  @throws ConfigurationException
  @throws UnknownHostException