s="keyword">let</span> type_info: unit <span>=&gt;</span> Depyt.t(<a href="index.html#type-t">t</a>);</code></dt><dt class="spec value" id="val-api_version"><a href="#val-api_version" class="anchor"></a><code><span class="keyword">let</span> api_version: <a href="index.html#type-t">t</a> <span>=&gt;</span> option(string);</code></dt><dd><p>Api_version defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrec