       <paper-item>Strikethrough</paper-item>
        </paper-menu>
      </div>
    </div>

    <div>
      <h4>Sub-menu</h4>
      <div class="horizontal-section">
        <paper-menu attr-for-item-title="label" multi>
          <paper-submenu label="paper-menu">
            <paper-item class="menu-trigger">paper-menu</paper-item>
            <paper-menu class="menu-content sublist" multi>
              <paper-submenu label="Properties">
                <paper-item class="menu-trigger">Properties</paper-i