.lang" class="external-link">String</a>,<wbr><a href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&gt;&gt;</span>&nbsp;<span class="element-name">getExtensions</span>()</div>
<div class="block">A list of (extension_name, behavior) pairs. This list is mutable,
 you can add or remove elements.</div>
</section>
</li>
<li>
<section class="detail" id="getUsage()">
<h3>getUsage</h3>
<div class="member-s