to a jar file or referring to a directory
 that contains an exploded jar file, or some other URL from
 which an InputStream in jar format can be obtained.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a list of URL objects referring to jar files or
 directories</dd>
</dl>
</li>
</ul>
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<h4>getPersistenceUnitRootUrl</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.ht