code: public URI withEmptyAuthority(final URI uri) {
      URI _xifexpression = null;
      if ((uri.isFile() && (uri.authority() == null))) {
        _xifexpression = URI.createHierarchicalURI(uri.scheme(), "", uri.device(), uri.segments(), uri.query(), uri.fragment());
      } else {
        _xifexpression = uri;
      }
      return _xifexpression;
    }
docs: converts the file URIs with an absent authority to one with an empty