code: public static FileSystem newFileSystem(String name, Configuration configuration) {
      try {
        URI uri = new URI(URI_SCHEME, name, null, null);
        return newFileSystem(uri, configuration);
      } catch (URISyntaxException e) {
        throw new IllegalArgumentException(e);
      }
    }
docs: Creates a new in-memory file system with the given configuration.
  
  <p>The returned file system uses the given name as the host part of its URI and the URIs of
  paths in the file system. For example, given the name {@code my-file-system}, the file system's
  URI will be {@code jimfs://my-file-system} and the URI of the path {@code /foo/bar} will be
  {@code jimfs://my-file-system/foo/bar}.