an><span class="op">(</span></span>
<span>      fill_color <span class="op">=</span> <span class="st">"cyan"</span>,</span>
<span>      fill_opacity <span class="op">=</span> <span class="fl">1</span></span>
<span>    <span class="op">)</span></span>
<span>  <span class="op">)</span> <span class="op">|&gt;</span> </span>
<span>  <span class="fu"><a href="https://walker-data.com/mapgl/reference/add_fill_layer.html" class="external-link">add_fill_layer</a></span><span class="op">(</span></span>
<span>    id <