an><span class="va">pred</span><span class="op">)</span> <span class="op">+</span> <span class="fu">expit</span><span class="op">(</span><span class="va">low</span><span class="op">)</span> <span class="op">+</span> <span class="fu">expit</span><span class="op">(</span><span class="va">upp</span><span class="op">)</span> <span class="op">~</span> <span class="va">year</span> <span class="op">|</span> <span class="va">group</span>, data <span class="op">=</span> <span class="va">plot_data_m</span>,</span></s