e></dt><dt class="spec value" id="val-find_last_opt"><a href="#val-find_last_opt" class="anchor"></a><code><span class="keyword">val</span> find_last_opt : <span>(<a href="index.html#type-elt">elt</a> <span>&#45;&gt;</span> bool)</span> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><a href="index.html#type-elt">elt</a> option</span></code></dt><dt class="spec value" id="val-of_list"><a href="#val-of_list" class="anchor"></a><code><span class="keyword">val</span> of_li