seekToXml static method
Implementation
static String seekToXml(sk) {
return '''<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<s:Body>
<u:Seek xmlns:u="urn:schemas-upnp-org:service:AVTransport:1">
<InstanceID>0</InstanceID>
<Unit>REL_TIME</Unit>
<Target>$sk</Target>
</u:Seek>
</s:Body>
</s:Envelope>''';
}