<span class="keyword">with</span> <span><span class="keyword">type</span> <span class="xref-unresolved">key</span> = <span class="xref-unresolved">state</span></span></span></code></div></div><div class="odoc-spec"><div class="spec module anchored" id="module-Tree"><a href="#module-Tree" class="anchor"></a><code><span><span class="keyword">module</span> <a href="Tree/index.html">Tree</a></span><span> : <a href="../../../Utils/Tree/module-type-S/index.html">Utils.Tree.S</a> <span class="keyword">with</span> 