code: public static String toXml(final String jsonString) throws JSONException
  	{
  		final JSONObject json = new JSONObject(jsonString);
  		final String xmlString = XML.toString(json);
  		return xmlString;
  	}
docs: Transform the given json as {@link String} object to an xml as {@link String} object.
  
  @param jsonString
  the json as {@link String} object
  @return the transformed xml as {@link String} object
  @throws JSONException
  if there is a syntax error in the source string or a duplicated key.