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<dd>the parameters that were provided with the SecurityContext#authenticate(AuthParameters) call, or a default instance. Never null.</dd>
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<h4>getHandler</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/javax/security/auth/callback/CallbackHandler.html?is-external=true" title="class or interface in javax.security.auth.callback">CallbackHandler</a>&nbsp;getHandler()</pre>
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