code: public String marshal(ResponseWrapper response) {
      Gson gson = new Gson();
  
      Response jsonResponse = composeResponseFromResponseWrapper(response);
  
      String jsonString = gson.toJson(jsonResponse);
  
      return jsonString;
    }
docs: Translate the ResponseWrapper into the wireline string. See {@link ResponseWrapper}
  
  @param response the instance of the ResponseWrapper
  @return the wireline string