work</a> without support for splitting the network
and adds a <code>nrow:1</code> topo_sort attribute.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">add_topo_sort</span><span class="op">(</span><span class="va">x</span>, outlets <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span>
<span></span>
<s