private function createGroup($ownerID)
 {
     // Create new group owned by another
     $xml = new \SimpleXMLElement('<group/>');
     $xml['owner'] = $ownerID;
     $xml['name'] = 'Test';
     $xml['type'] = 'Private';
     $xml['libraryEditing'] = 'admins';
     $xml['libraryReading'] = 'members';
     $xml['fileEditing'] = 'admins';
     $xml['description'] = 'This is a description';
     $xml['url'] = '';
     $xml['hasImage'] = 0;
     $xml = $xml->asXML();
     $response = API::superPost('groups', $xml);
     $this->assert201($response);
     return $response;
 }