aybe, TestScheduler)</code></a> to construct
 an <a href="../../rx/testkit/AssertMaybe.html" title="class in rx.testkit"><code>AssertMaybe</code></a> instance that can be used for async testing.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>duration</code> - the time duration</dd>
<dd><code>timeUnit</code> - the time unit of the duration</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the AssertMaybe instance.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd