le-Alt" class="anchor"></a><code><span class="keyword">module</span> <a href="Alt/index.html">Alt</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-Foldable"><a href="#module-Foldable" class="anchor"></a><code><span class="keyword">module</span> <a href="Foldable/index.html">Foldable</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-List"><a href="#module-List" 