t</a></code></dt><dt class="spec value" id="val-add_elem"><a href="#val-add_elem" class="anchor"></a><code><span class="keyword">val</span> add_elem : <a href="../../../IBase/Location/index.html#type-t">IBase.Location.t</a> <span>&#45;&gt;</span> <a href="../index.html#type-elem">elem</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt><dt class="spec value" id="val-call"><a href="#val-call" class="anchor"></a><code><span class="ke