<c-lb.breadcrumbs>
  <c-lb.breadcrumbs.item viewname="home">Home</c-lb.breadcrumbs.item>
  <c-lb.breadcrumbs.item viewname="project_list">Projects</c-lb.breadcrumbs.item>
  <c-lb.breadcrumbs.item viewname="project_detail" l:pk="42">Project Alpha</c-lb.breadcrumbs.item>
  <c-lb.breadcrumbs.item>Settings</c-lb.breadcrumbs.item>
</c-lb.breadcrumbs>