code: public static DefaultGoApiResponse success(String responseBody) {
          DefaultGoApiResponse defaultGoApiResponse = new DefaultGoApiResponse(SUCCESS_RESPONSE_CODE);
          defaultGoApiResponse.setResponseBody(responseBody);
          return defaultGoApiResponse;
      }
docs: Creates an instance DefaultGoApiResponse which represents success request with response code 200
  
  @param responseBody Json formatted response body
  @return an instance of DefaultGoApiResponse