@Override
protected void populateItem(ListItem<BookmarkTreeNode> item) {
final BookmarkTreeNode node = item.getModelObject();
final PageParameters pageParameters = node.getPageParameters();
final PageType pageType = PageParameterNames.PAGE_TYPE.getEnumFrom(pageParameters, PageType.class);
final Class<? extends Page> pageClass = pageClassRegistry.getPageClass(pageType);
final AjaxLink<Object> clearBookmarkLink = new AjaxLink<Object>(ID_CLEAR_BOOKMARK_LINK) {
private static final long serialVersionUID = 1L;