protected final TextBlock getTextBlock(Display display) {
   if (Display.isNull(display)) {
     return null;
   }
   final ISkinParam skinParam = getSkinParam();
   final UFont font = skinParam.getFont(FontParam.ACTIVITY_ARROW, null, false);
   final HtmlColor color = rose.getFontColor(skinParam, FontParam.ACTIVITY_ARROW);
   final FontConfiguration fontConfiguration =
       new FontConfiguration(
           font, color, skinParam.getHyperlinkColor(), skinParam.useUnderlineForHyperlink());
   return display.create(
       fontConfiguration, HorizontalAlignment.LEFT, this, CreoleMode.SIMPLE_LINE);
 }