code: public void selectItemAfter(CmsContextMenuItemWidget item) {
  
          int index = m_menuItems.indexOf(item);
  
          index += 1;
  
          if (index >= m_menuItems.size()) {
              index = 0;
          }
  
          CmsContextMenuItemWidget itemToSelect = m_menuItems.get(index);
          itemToSelect.setFocus(true);
      }
docs: Selects the next sibling.<p>
  
  @param item the item