class="r-in"><span></span></span>
<span class="r-in"><span><span class="va">models</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/list.html" class="external-link">list</a></span><span class="op">(</span></span></span>
<span class="r-in"><span> M1 <span class="op">=</span> <span class="fu"><a href="make_model.html">make_model</a></span><span class="op">(</span><span class="st">"X -&gt; Y"</span><span class="op">)</span>,</span></span>
<span class="r-in"><span> M2 <span 