private StringRenderer getStringRenderer(Class<?> clazz) {
   return itemStrategyHandler.getStringRenderer(clazz);
 }
 private void setItemProperties(Item item, Object itemData) {
   itemStrategyHandler.setItemProperties(item, itemData);
   iconUpdater.updateIcon(
       item, (Boolean) item.getItemProperty(MBeansTree.MetaMBeansTreeItem.SELECTED).getValue());
 }