code: public void saveToFile(String outputFile) throws FileNotFoundException, IOException {
      Streams.copy(getInputStream(), new BufferedOutputStream(new FileOutputStream(outputFile)));
    }
docs: Writes the contents of the response to the specified File.
  
  @param outputFile the output file to write to
  @throws FileNotFoundException if unable to write to {@code outputFile}
  @throws IOException if unable to read the response contents