es Int, Float and Bool nullable on static targets." href="../../../Null.html">Null</a>&lt;<a class="type" title="haxe.Function - This type unifies with any function type." href="../../../haxe/Function.html">Function</a>&gt;</code></h3><div class="doc"><p></p></div></div><div class="field "><a name="onfade"></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 hr