s="sourceCode" id="cb170"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb170-1"><a href="advanced-topics.html#cb170-1"></a><span class="co"># preRenderHook function</span></span>
<span id="cb170-2"><a href="advanced-topics.html#cb170-2"></a>render_gio &lt;-<span class="st"> </span><span class="cf">function</span>(g){</span>
<span id="cb170-3"><a href="advanced-topics.html#cb170-3"></a>  <span class="co"># only keep relevant variables</span></span>
<span id="cb170-4"><a href="advanced-topic