docs: public static List<String> list(URI metadataService, String path) {
      checkArgument(checkNotNull(path, "path").endsWith("/"), "path must end with '/'; %s provided",
                    path);
      String content = get(metadataService, path);
      if (content != null) {
        return split('\n', content);
      }
      return Collections.<String>emptyList();
    }