a-annotation">@DomName(&apos;MetadataCallback&apos;)</li>
                    <li class="metadata-annotation">@Experimental()</li>
                </ol>
            </div>
            <span class="returntype">void</span>
            <span class="name ">MetadataCallback</span>(
            <br>
            <div class="parameters">
                <span class="parameter" id="MetadataCallback-param-metadata"><span class="type-annotation"><a href="polymer_app_layout/Metadata-class.html">Metadata</a></span> <spa