he method.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>key</code> - the key.</dd>
<dt>Returns:</dt>
<dd>value list registered with the key. The method is guaranteed to never return <code>null</code>.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="toString()">
<h3>toString</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or 