code: public static ZooKeeperLeaderRetrievalService createLeaderRetrievalService(
  		final CuratorFramework client,
  		final Configuration configuration) throws Exception {
  		return createLeaderRetrievalService(client, configuration, "");
  	}
docs: Creates a {@link ZooKeeperLeaderRetrievalService} instance.
  
  @param client        The {@link CuratorFramework} ZooKeeper client to use
  @param configuration {@link Configuration} object containing the configuration values
  @return {@link ZooKeeperLeaderRetrievalService} instance.
  @throws Exception