groups">.groups<a class="anchor" aria-label="anchor" href="#arg--groups"></a></dt>
<dd><p>Grouping structure of the result</p><ul><li><p>"drop_last": Drop the last level of grouping</p></li>
<li><p>"drop": Drop all groups</p></li>
<li><p>"keep": Keep all groups</p></li>
</ul></dd>


<dt id="arg--unpack">.unpack<a class="anchor" aria-label="anchor" href="#arg--unpack"></a></dt>
<dd><p><em>experimental</em>: Default <code>FALSE</code>. Should unnamed data frame inputs be unpacked.
The user must opt in to this