code: public static String stringify(Parameters parameters, String indentString) {
          if (parameters == null) {
              return null;
          }
          try {
              Writer writer = new StringWriter();
              AponWriter aponWriter = new AponWriter(writer);
              aponWriter.setIndentString(indentString);
              aponWriter.write(parameters);
              aponWriter.close();
              return writer.toString();
          } catch (IOException e) {
              return null;
          }
      }
docs: Converts a Parameters object to an APON formatted string.
  
  @param parameters the Parameters object to be converted
  @param indentString the indentation string
  @return a string that contains the APON text