l?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></code> - if the implementation supports no endpoint types.</dd>
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<h4>createHeaderDelegate</h4>
<pre>public abstract&nbsp;&lt;T&gt;&nbsp;<a href="../../../../jakarta/ws/rs/ext/RuntimeDelegate.HeaderDelegate.html" title="interface in jakarta.ws.rs.ext">RuntimeDelegate.HeaderDelegate</a>&lt;T