> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt></dl><div class="spec module" id="module-Assoc"><a href="#module-Assoc" class="anchor"></a><code><span class="keyword">module</span> <a href="Assoc/index.html">Assoc</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><dl><dt class="spec value" id="val-sub"><a href="#val-sub" class="anchor"></a><code><span class="keyw