code: private String getBlankResponseXml() {
          Map<String, Object> data = new HashMap<String, Object>();
          data.put("requestID", UUID.randomUUID().toString());
  
          String ret = null;
  
          try {
              ret = TemplateUtils.get(BLANK_RESPONSE_TEMPLATE, data);
          } catch (AwsMockException e) {
              log.error("fatal exception caught: {}", e.getMessage());
              e.printStackTrace();
          }
          return ret;
      }
docs: Generate blank response body in xml and write it with writer.
  
  @return xml body blank response which can be recognized by AWS clients