ht navbar-expand-md bs-sidebar hidden-print affix" role="complementary">
    <div class="navbar-header">
        <button type="button" class="navbar-toggler collapsed" data-toggle="collapse" data-target="#toc-collapse" title="Table of Contents">
            <span class="fa fa-angle-down"></span>
        </button>
    </div>

    
    <div id="toc-collapse" class="navbar-collapse collapse card bg-secondary">
        <ul class="nav flex-column">
            
            <li class="nav-item" data-level="1"><a 