hed to the edges of the tree</p></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-t"><a href="#type-t" class="anchor"></a><code><span><span class="keyword">type</span> t</span><span> = </span></code><ol><li id="type-t.Empty" class="def variant constructor anchored"><a href="#type-t.Empty" class="anchor"></a><code><span>| </span><span><span class="constructor">Empty</span></span></code></li><li id="type-t.Node" class="def variant constructor anchored"><a href="#type-t.Node" class="a