<details open="open"><summary class="spec include"><code><span><span class="keyword">include</span> <span class="xref-unresolved">IStdlib</span>.IStd.Caml.Map.S <span class="keyword">with</span> <span><span class="keyword">type</span> <span class="xref-unresolved">key</span> = <span class="xref-unresolved">id</span></span></span></code></summary><div class="odoc-spec"><div class="spec type" id="type-key" class="anchored"><a href="#type-key" class="anchor"></a><code><span><span class="keyword">type</span> ke