n class="paramLabel">Parameters:</span></dt>
<dd><code>metadataElement</code> - The element to be added to the
      <code>wsa:Metadata</code> element.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <code>W3CEndpointReferenceBuilder</code> instance with
   the <code>metadataElement</code> added to the
    <code>wsa:Metadata</code> element.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html