-category.ACobjc_null" class="anchored"><td class="def variant constructor"><a href="#type-category.ACobjc_null" class="anchor"></a><code><span>| </span><span><span class="constructor">ACobjc_null</span></span></code></td></tr><tr id="type-category.ACundef" class="anchored"><td class="def variant constructor"><a href="#type-category.ACundef" class="anchor"></a><code><span>| </span><span><span class="constructor">ACundef</span></span></code></td></tr><tr id="type-category.ACretval" class="anchored"><td class