code: @Override
      public String getCssText() {
          final CSSStyleDeclarationImpl style = getStyle();
          if (null == style) {
              return "";
          }
  
          final String selectorText = selectors_.toString();
          final String styleText = style.toString();
  
          if (null == styleText || styleText.length() == 0) {
              return selectorText + " { }";
          }
  
          return selectorText + " { " + styleText + " }";
      }
docs: {@inheritDoc}