recated.html">is_alluvial()</a></code> is deprecated and will be removed in a future version.</li>
<li>The parameter <code>logical</code> is deprecated. In a future version, the functions <code>is_*_form()</code> will only return logical values.</li>
<li>The setting <code>silent = TRUE</code> now silences all messages.</li>
<li>The functions <code>is_*_form()</code> now return <code>FALSE</code> if any weights are negative, with a message to this effect.</li>
<li>These functions now accept unquoted variable