alue" id="val-remove"><a href="#val-remove" class="anchor"></a><code><span class="keyword">val</span> remove : <a href="index.html#type-key">key</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-merge"><a href="#val-merge" class="anchor"></a><code><span class="keyword">val</span> merge : <span>(<a href="index.html#type-key">key</a> <span>&#45;&gt;</span> <span><a href="index.html#type-value">value</