<!-- Semmet Angular: Tree View — https://www.w3.org/WAI/ARIA/apg/patterns/treeview/ -->
<!--
Usage from a parent component template:
Import <%= classify(name) %>, <%= classify(name) %>Item and <%= classify(name) %>Group in that
parent component. This directive set never owns markup: nest <ul>/<li> as deep as the tree needs —
each level's group is always rendered, `[<%= camelize(name) %>Group]` hides it declaratively while collapsed.

<ul <%= camelize(name) %> label="Files">
  <li <%= camelize(name) %>Item value="documents" [expanded]="true">
    Documents
    <ul <%= camelize(name) %>Group>
      <li <%= camelize(name) %>Item value="resume">Resume.pdf</li>
      <li <%= camelize(name) %>Item value="cover-letter">Cover Letter.docx</li>
    </ul>
  </li>
</ul>
-->
