code: public void setAdditionalInfoVisible(boolean visible) {
  
          if (m_openClose == null) {
              return;
          }
          if (visible) {
              addStyleName(CmsListItemWidget.OPENCLASS);
              m_openClose.setDown(true);
              OpenEvent.fire(this, this);
          } else {
              removeStyleName(CmsListItemWidget.OPENCLASS);
              m_openClose.setDown(false);
              CloseEvent.fire(this, this);
          }
          CmsDomUtil.resizeAncestor(getParent());
      }
docs: Sets the additional info visible if present.<p>
  
  @param visible <code>true</code> to show, <code>false</code> to hide