me way as
<code>dplyr</code>. <code>mutate</code> / <code>select</code> / <code>rename</code> generally don't add anything in terms
of provenance of data so the default behaviour is to miss these out of the
<code>dtrackr</code> history. This can be overridden with the <code>.messages</code>, or
<code>.headline</code> values in which case they behave just like a <code><a href="comment.html">comment()</a></code>.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" ar