>+</span> text</span>
<span id="cb28-2"><a href="#cb28-2" aria-hidden="true" tabindex="-1"></a>base <span class="sc">+</span> </span>
<span id="cb28-3"><a href="#cb28-3" aria-hidden="true" tabindex="-1"></a>  <span class="fu">as_group</span>(poly1, poly2, poly3, poly4, <span class="at">id =</span> <span class="st">"polygons"</span>, <span class="at">include =</span> <span class="cn">TRUE</span>) <span class="sc">+</span></span>
<span id="cb28-4"><a href="#cb28-4" aria-hidden="true" tabindex="-1"></a>  <span