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<td class="colFirst"><code><a href="../../../jakarta/websocket/ClientEndpointConfig.Builder.html" title="class in jakarta.websocket">ClientEndpointConfig.Builder</a></code></td>
<td class="colLast"><span class="typeNameLabel">ClientEndpointConfig.Builder.</span><code><span class="memberNameLink"><a href="../../../jakarta/websocket/ClientEndpointConfig.Builder.html#extensions-java.util.List-">extensions</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/uti