an><span class="fu">a_multipoint</span><span class="op">(</span> <span class="va">x</span> <span class="op">)</span></span>
<span><span class="co">#  [[1]]</span></span>
<span><span class="co">#       [,1] [,2]</span></span>
<span><span class="co">#  [1,]    1    2</span></span>
<span><span class="co">#  attr(,"class")</span></span>
<span><span class="co">#  [1] "XY"         "MULTIPOINT" "sfg"       </span></span>
<span><span class="co">#  </span></span>
<span><span class="co">#  attr(,"n_empty")</span></sp