code: public boolean isDataValid() {
      boolean valid = false;
      for (Object value : values.values()) {
        if (value instanceof String) {
          String tt = (String) value;
          if (Strings.isNotBlank(tt)) {
            valid = true;
            break;
          }
        } else {
          if (null != value) {
            valid = true;
            break;
          }
        }
      }
      return valid;
    }
docs: <p>
  isDataValid.
  </p>
  
  @return a boolean.