e><span class="r-in"><span><span class="fu">check_specs</span><span class="op">(</span></span></span>
<span class="r-in"><span>  implicit_keys <span class="op">=</span> <span class="st">"ignore"</span>,</span></span>
<span class="r-in"><span>  grouped_input <span class="op">=</span> <span class="st">"inform"</span>,</span></span>
<span class="r-in"><span>  column_conflict <span class="op">=</span> <span class="st">"abort"</span>,</span></span>
<span class="r-in"><span>  na_keys <span class="op">=</span><spa