docs: public static com.simiacryptus.util.io.HtmlNotebookOutput create(final File parentDirectory) throws FileNotFoundException {
      @javax.annotation.Nonnull final FileOutputStream out = new FileOutputStream(new File(parentDirectory, "index.html"));
      return new com.simiacryptus.util.io.HtmlNotebookOutput(parentDirectory, out) {
        @Override
        public void close() throws IOException {
          out.close();
        }
      };
    }