private static boolean isEnabled(AntDomElement element) {
    final String ifProperty = getAttributeValue(element, "if");
    if (ifProperty != null && PropertyResolver.resolve(element.getContextAntProject(), ifProperty, element).element() == null) {
      return false;
    }
    final String unlessProperty = getAttributeValue(element, "unless");
    if (unlessProperty != null && PropertyResolver.resolve(element.getContextAntProject(), unlessProperty, element).element() != null) {
      return false;
    }
    return true;
  }
private static boolean isEnabled(AntDomElement element)