ass="keyword">module </span><a href="H4">H4</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-H5"><a href="#module-H5" class="anchor"></a><code><span class="keyword">module </span><a href="H5">H5</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-H6"><a href="#module-H6" class="anchor"></a><code><span class="keyword">module </span><a href="H6">H6</a> : <span clas