n>&nbsp;<span class="element-name">getRootCause</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a>&nbsp;t)</span></div>
<div class="block"><p class="changed_added_2_0">
 Unwrap the argument <code>t</code> until the unwrapping encounters an Object whose <code>getClass()</code> is not
 equal to <code>FacesException.class</code> or <code>jakarta.el.ELExce