="#arg-values-fn"></a></dt>
<dd><p>Optionally, a function applied to the value in each cell
in the output. You will typically use this when the combination of
<code>id_cols</code> and <code>names_from</code> columns does not uniquely identify an
observation.</p>
<p>This can be a named list if you want to apply different aggregations
to different <code>values_from</code> columns.</p></dd>


<dt id="arg-unused-fn">unused_fn<a class="anchor" aria-label="anchor" href="#arg-unused-fn"></a></dt>
<dd><p>Optionally