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