class="collapse navbar-collapse ms-3">
      <ul class="navbar-nav me-auto"><li class="nav-item"><a class="nav-link" href="../index.html" aria-label="Homepage"><span class="fa fa-home"></span></a></li>
<li class="nav-item"><a class="nav-link" href="../articles/index.html">Vignettes</a></li>
      </ul><ul class="navbar-nav"><li class="active nav-item"><a class="nav-link" href="../reference/index.html"><span class="fa fa-file-code-o"></span> functions</a></li>
<li class="nav-item"><a class="external-link nav