ies or
 <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/javax/net/ssl/SSLEngine.html?is-external=true" title="class or interface in javax.net.ssl" class="externalLink"><code>SSL engines</code></a>. Must not be <code>null</code>.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an updated client builder instance.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/NullPointerException