l">Returns:</span></dt>
<dd>an updated client builder instance.</dd>
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<h4>executorService</h4>
<pre class="methodSignature">public abstract&nbsp;<a href="ClientBuilder.html" title="class in jakarta.ws.rs.client">ClientBuilder</a>&nbsp;executorService&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/ExecutorService.html?