ef.</p></dd></dl><dl><dt class="spec value" id="val-get_opt"><a href="#val-get_opt" class="anchor"></a><code><span class="keyword">val</span> get_opt : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><a href="index.html#type-value">value</a> option</span></code></dt><dd><p>Get a value from the cache or <code>None</code> if no value is stored</p></dd></dl><dl><dt class="spec value" id="val-get"><a href="#val-get" class="anchor"></a><code><span class="keyword">val</span> get : <a href="index.ht