code: protected boolean mightBeValidatorAnnotated() {
          for (ActionFormProperty property : propertyMap.values()) {
              final Field field = property.getPropertyDesc().getField();
              if (field == null) { // not field property
                  continue;
              }
              for (Annotation anno : field.getAnnotations()) {
                  if (isValidatorAnnotation(anno.annotationType())) {
                      return true; // first level only
                  }
              }
          }
          return false;
      }
docs: ==================