ia-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Define class O</span></span></span>
<span class="r-in"><span><span class="va">O</span> <span class="op">&lt;-</span> <span class="fu"><a href="new_class.html">new_class</a></span><span class="op">(</span>class_name <span class="op">=</span> <span class="st">"O"</span><span class="op">)</span></span></span>
<span class