 <span class="op">=</span> <span class="va">graph</span>, </span>
<span>                           order <span class="op">=</span> <span class="fl">2</span>,</span>
<span>                           nodes <span class="op">=</span> <span class="st">"pid"</span><span class="op">)</span><span class="op">[[</span><span class="fl">1</span><span class="op">]</span><span class="op">]</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><spa