pan>
            </button>
            <div class="navbar-collapse collapse justify-content-center" id="collapsingNavbar">
                <ul class="navbar-nav ml-auto">
                     <li class="nav-item dropdown">
                        <a class="nav-link dropdown-toggle" href="#" id="layoutDd" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                          Layouts
                        </a>
                        <div class="dropdown-menu" aria-labelledby="layoutDd