private function addNsGroup(eppHost $host)
{
if (!strlen($host->getHostname())) {
throw new eppException('No valid hostname in create host request');
}
#
# Object create structure
#
$create = $this->createElement('create');
$this->hostobject = $this->createElement('nsgroup:create');
$this->hostobject->appendChild($this->createElement('nsgroup:name', $host->getHostname()));
$this->hostobject->appendChild($this->createElement('nsgroup:ns', $host->getHostname()));
$create->appendChild($this->hostobject);
$this->getCommand()->appendChild($create);
return;
}