r id="type-t.OptionalEmpty" class="anchored"><td class="def constructor"><a href="#type-t.OptionalEmpty" class="anchor"></a><code>| </code><code><span class="constructor">OptionalEmpty</span></code></td></tr><tr id="type-t.StdVector" class="anchored"><td class="def constructor"><a href="#type-t.StdVector" class="anchor"></a><code>| </code><code><span class="constructor">StdVector</span> <span class="keyword">of</span> <a href="index.html#type-std_vector_function">std_vector_function</a></code></td></tr><tr 