#arg-names-sort"></a></dt>
<dd><p>Should the column names be sorted? If <code>FALSE</code>, the default,
column names are ordered by first appearance.</p></dd>


<dt id="arg-names-vary">names_vary<a class="anchor" aria-label="anchor" href="#arg-names-vary"></a></dt>
<dd><p>When <code>names_from</code> identifies a column (or columns) with
multiple unique values, and multiple <code>values_from</code> columns are provided,
in what order should the resulting column names be combined?</p><ul><li><p><code>"faste