docs: public void saveAsPDF(File file) throws IOException, TranscoderException, ClassNotFoundException {
      try {
        Object t = Class.forName("org.apache.fop.svg.PDFTranscoder").newInstance();
        transcode(file, (Transcoder) t);
      }
      catch(InstantiationException | IllegalAccessException e) {
        throw new ClassNotFoundException("Could not instantiate PDF transcoder - is Apache FOP installed?", e);
      }
    }