<span class="identifier">previous</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">Null</a>&lt;<a class="type" title="haxe.Exception - Base class for exceptions." href="../../haxe/Exception.html">Exception</a>&gt;</code></h3><div class="doc"><p>Contains an exception, which was passed to <code>previous</code> constructor argument.</p></div></div><div class="field "><a na