alueEvent.html" title="class in javax.faces.event"><code>PostKeepFlashValueEvent</code></a> and <a href="../../../javax/faces/event/PostPutFlashValueEvent.html" title="class in javax.faces.event"><code>PostPutFlashValueEvent</code></a>, 
 this value is substituted for <code>null</code> as the source in the case when a 
 <code>null</code> value is put to or kept in the flash.</div>
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