nd<a class="anchor" aria-label="anchor" href="#arg-aes-bind"></a></dt>
<dd><p>At what grouping level, if any, to prioritize differentiation
aesthetics when ordering the lodes within each stratum. Defaults to
<code>"none"</code> (no aesthetic binding) with intermediate option <code>"flows"</code> to bind
aesthetics after stratifying by axes linked to the index axis (the one
adjacent axis in <code><a href="stat_flow.html">stat_flow()</a></code>; all remaining axes in <code>stat_alluvium()</code>)
and stronges