hor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="va">fu_1_2023</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="format">Format<a class="anchor" aria-label="anchor" href="#format"></a></h2>
    <p>An object of class <code>character</code> of length 11.</p>
    </div>
    <div class="section level2">
    <h2 id="source">Source<a class="anchor" aria-label="anchor" href="#source"></a></h2>
    <p>Color defini