mmarise</a></span><span class="op">(</span>m <span class="op">=</span> <span class="fu"><a href="../reference/sum_byname.html">sum_byname</a></span><span class="op">(</span><span class="va">m</span><span class="op">)</span>, .groups <span class="op">=</span> <span class="st">"drop"</span><span class="op">)</span></span>
<span><span class="co">#&gt; Warning: Returning more (or less) than 1 row per `summarise()` group was deprecated in</span></span>
<span><span class="co">#&gt; dplyr 1.1.0.</span></span>
<spa