eCode julia"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@chain</span> df <span class="kw">begin</span></span>
<span id="cb10-2"><a href="#cb10-2" aria-hidden="true" tabindex="-1"></a>    filter(<span class="op">:</span><span class="kw">type</span> <span class="op">=&gt;</span> <span class="op">==</span>(<span class="st">"confirmed"</span>)<span class="op">,</span>_)</span>
<span id="cb10-3"><a href="#cb10-3" aria-hidden="true" tabindex="-1"></a>    groupby([<sp