How to add a breadcrumb without link

In /views/default/resources/groups/profile.php, there is a line of code trying to push a breadcrumb without link using elgg_push_breadcrumb($group->name), but apparently it's not working. group name breadcrumb is not showing on group profile page. I tried elgg_push_breadcrumb($group->name, 'example.com'), then the group name will show up. I tried elgg_push_breadcrumb($group->name, ''), also not working. So How to add a breadcrumb without link address in elgg? Thanks