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<h4>keep</h4>
<pre>public abstract&nbsp;void&nbsp;keep(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)</pre>
<div class="block"><p class="changed_added_2_0">Causes a value stored with a
 previous call to <a href="../../../javax/faces/context/Flash.html#putNow-java.lang.String-java.lang.Object-"><cod