5;&gt;</span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> option</span></span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-find_last" class="anchored"><a href="#val-find_last" class="anchor"></a><code><span><span class="keyword">val</span> find_last : <span><span>( <span><a href="#type-key">key</a> <span class="arr