re-dropdown class="dropdown">
          <core-menu>
            <template repeat="{{pastries}}">
              <core-item>{{}}</core-item>
            </template>
          </core-menu>
        </core-dropdown>
      </core-menu-button>

    </section>

    <section>

      <div>Layered menu buttons</div>

      <button onclick="document.getElementById('collapse').toggle()">toggle core-collapse</button>

      <br>

      <core-collapse id="collapse">

        <core-menu-button>
          <core-icon-button 