-item" href="#">Dropdown link</a>
              </div>
            </div>
          </div>

          <div class="btn-group" role="group" aria-label="Button group with nested dropdown">
            <button type="button" class="btn btn-success">Success</button>
            <div class="btn-group" role="group">
              <button id="btnGroupDrop2" type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"></button>
              <div class="dropd