@Override
  public String getDefaultValueText() {
    XmlAttributeValue value = getDefaultValue();
    if (value == null) return null;
    String text = value.getText();
    if (text.indexOf('%') == -1 && text.indexOf('&') == -1) return text;

    final StringBuilder builder = new StringBuilder();
    value.processElements(new PsiElementProcessor() {
      @Override
      public boolean execute(@NotNull PsiElement element) {
        builder.append(element.getText());
        return true;
      }
    }, null);
    return builder.toString();
  }
@Override
  public String getDefaultValueText()