Is there a "wrap" function in R?
<p>I was reading code on this page:
<a href="https://github.com/ggobi/ggally/issues/31" rel="nofollow">https://github.com/ggobi/ggally/issues/31</a></p>

<pre><code>upper = list(continuous = wrap("cor", size = 9))
</code></pre>

<p>Has anyone heard of a function called <code>wrap</code>? I always get:</p>

<blockquote>
  <p>error: could not find function "wrap"</p>
</blockquote>

<p>It does not belong to <code>base</code> package. </p>