il"></a><h3><p><code><a href="#nil"><span class="identifier">nil</span></a> ():<a class="type" title="" href="../../thx/promise/Future.html">Future</a>&lt;<a class="type" title="A runtime value that describes the absence of a value." href="../../thx/Nil.html">Nil</a>&gt;</code></p></h3><div class="doc"><p></p></div></div><div class="field "><a name="then"></a><h3><p><code><a href="#then"><span class="identifier">then</span></a> (<span style="white-space:nowrap">handler:<span class="type">T</span>&nbsp;&#820