est-toc-link="@action, {{on}} and {{fn}}" href="/v4.0.0/upgrading/current-edition/action-on-and-fn">
            <span class="link-text">
              @action, {{on}} and {{fn}}
            </span>
          </a>
        </li>
              <li class="toc-item toc-link ">
          <a id="ember462194" class="ember-view" data-test-toc-link="Glimmer Components" href="/v4.0.0/upgrading/current-edition/glimmer-components">
            <span class="link-text">
              Glimmer Components
            </span