">Fields</h3><div class="fields"><div class="field "><a name="subtree"></a><h3 class="anchor"><code><span class="label label-meta label-meta-optional" title="Marks the field of a structure as optional.">@:optional</span><span class="label label-optional">optional</span><a href="#subtree"><span class="identifier">subtree</span></a>:<a class="type" title="Null - Null&amp;lt;T&amp;gt; is a wrapper that can be used to make the basic types Int, Float and Bool nullable on static targets." href="../../Null.html">N