="keyword">sig</span> ... <span class="keyword">end</span></code></dt><dd></dd></dl><dl><dt class="spec module" id="module-WeakMap"><a href="#module-WeakMap" class="anchor"></a><code><span class="keyword">module</span> <a href="WeakMap/index.html">WeakMap</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></dt><dd></dd></dl><dl><dt class="spec module" id="module-WeakPtr"><a href="#module-WeakPtr" class="anchor"></a><code><span class="keyword">module</span> <a href="WeakPtr/ind