 <span class="fl">1</span>,</span>
<span>            <span class="fu">assertthat</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/assertthat/man/assert-is.html" class="external-link">is.date</a></span><span class="op">(</span><span class="va">event_date</span><span class="op">)</span>,</span>
<span>            <span class="fu"><a href="https://rdrr.io/r/base/character.html" class="external-link">is.character</a></span><span class="op">(</span><span class="va">predictors</span><s