private function SaveNewMemberGroups(array $selectedIDs, array $exIDs)
    {
        foreach ($selectedIDs as $selID)
        {
            if (!in_array($selID, $exIDs))
            {
                $pgGrp = new PageMembergroup();
                $pgGrp->SetPage($this->page);
                $pgGrp->SetMemberGroup(new Membergroup($selID));
                $pgGrp->Save();
            }
        }
        
    }