public function addDnsbeExtension()
{
$this->addExtension('xmlns:dnsbe', 'http://www.dns.be/xml/epp/dnsbe-1.0');
$ext = $this->createElement('extension');
$sidnext = $this->createElement('dnsbe:ext');
$info = $this->createElement('dnsbe:info');
$infodomain = $this->createElement('dnsbe:domain');
$infodomain->setAttribute('version', '2.0');
$info->appendChild($infodomain);
$sidnext->appendChild($info);
$ext->appendChild($sidnext);
$this->getCommand()->appendChild($ext);
}