dt id="arg--data">.data<a class="anchor" aria-label="anchor" href="#arg--data"></a></dt>
<dd><p>a dataframe which may be grouped</p></dd>


<dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt>
<dd><p>a dplyr filter specification as a set of formulae where the LHS
are predicates to test the data set against, items that match at least one
of the predicates will be included. The RHS is a glue specification,
defining the message, to be entered in the history graph for each predicate
m