utton" class="btn btn-secondary">Middle</button>
                <button type="button" class="btn btn-secondary">Right</button>
              </div>
            </div>
            <div class="btn-group" role="group" aria-label="Button group with nested dropdown">
              <button type="button" class="btn btn-secondary">1</button>
              <button type="button" class="btn btn-secondary">2</button>
            
              <div class="btn-group" role="group">
                <button id="btnGroupDr