r.period()</code></a></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>periodUnit</code> - a time unit</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>this instance</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>5.0.0</dd>
</dl>
</li>
</ul>
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<h4>setPeriod</h4>
<pre><a href="http://d.android.com/reference/android/support/annotation/NonNull.html?is-external=true" title="cl