atform-specific <code>java.security.Principal</code> that represents
 the name of authenticated caller, or null if the current caller is not authenticated.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Principal representing the name of the current authenticated user, or null if not authenticated.</dd>
</dl>
</li>
</ul>
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<h4>getPrincipalsByType</h4>
<pre>&lt;T extends <a href="htt