lear : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> unit</code></dt><dt class="spec value" id="val-reset"><a href="#val-reset" class="anchor"></a><code><span class="keyword">val</span> reset : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> unit</code></dt><dt class="spec value" id="val-copy"><a href="#val-copy" class="anchor"></a><code><span class="keyword">val</span> copy : <span><span class="t