n>&#45;&gt;</span> <a href="index.html#type-id">id</a> <span>&#45;&gt;</span> unit</code></dt></dl><div class="spec module" id="module-IdMap"><a href="#module-IdMap" class="anchor"></a><code><span class="keyword">module</span> IdMap : <a href="../../../../../../IStdlib/PrettyPrintable/index.html#module-type-PPMap">IStdlib.PrettyPrintable.PPMap</a> <span class="keyword">with</span> <span class="keyword">type</span> <a href="../../../../../../IStdlib/PrettyPrintable/index.html#module-type-PPMap">PPMap</a>.key