<pre>
  bs-accordion:
  libraries:
    - accordion:
        css:
          component:
            ../styles/accordion.css: {}
</pre>
<pre>
  <code>
    { { attach_library('ui_patterns/libraries.bs_accordion') } }
    { { attach_library('ui_patterns/bs-accordion.accordion') } }
  </code>
</pre>
