dt class="spec value" id="val-filter_fun"><a href="#val-filter_fun" class="anchor"></a><code><span class="keyword">val</span> filter_fun : string <span>&#45;&gt;</span> <span><a href="index.html#type-t">t</a> list</span> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><span><a href="index.html#type-t">t</a> list</span> option</span></code></dt></dl></div></body></html>