ef="#type-type_.Nil" class="anchor"></a><code><span>| </span><span><span class="constructor">Nil</span></span></code></li><li id="type-type_.None" class="def variant constructor anchored"><a href="#type-type_.None" class="anchor"></a><code><span>| </span><span><span class="constructor">None</span></span></code></li><li id="type-type_.Pid" class="def variant constructor anchored"><a href="#type-type_.Pid" class="anchor"></a><code><span>| </span><span><span class="constructor">Pid</span></span></code></li><li