private function SaveRights()
{
$groupID = $this->Value('UserGroup');
$userGroup = Usergroup::Schema()->ByID($groupID);
$this->site->SetUserGroup($userGroup);
if (!$userGroup) {
$oldRights = $this->site->GetUserGroupRights();
if ($oldRights) {
$oldRights->GetPageRights()->GetContentRights()->Delete();
}
$this->site->SetUserGroupRights(null);
} else {
$this->siteRights->Save();
$this->site->SetUserGroupRights($this->siteRights->Rights());
}
$this->site->Save();
}
