ium pairs are duplicated, and throws the previous warning as a message. This should be more helpful than the previous behavior of suppressing the warning and leaving <code><a href="https://tidyr.tidyverse.org/reference/gather.html" class="external-link">tidyr::gather()</a></code> to throw an error referring to rows of the already-transformed internal data.</li>
<li>Default aesthetic specifications <code>stratum = NULL</code> and <code>alluvium = NULL</code> have been added to the stats. This prevents the �