   <span class="co"># do stuff</span></span>
<span>               <span class="co"># ...</span></span>
<span>               <span class="kw"><a href="https://rdrr.io/r/base/function.html" class="external-link">return</a></span><span class="op">(</span><span class="va">results</span><span class="op">)</span></span>
<span>         <span class="op">}</span></span>
<span>   </span></code></pre></div>

<p>That is, it must be able to run if called as:</p>
<div class="sourceCode"><pre><code><span></span>
<span>   