private function _convertCloseAuthorization($request) {
        
        $parameters = array();
        $parameters['Action'] = 'CloseAuthorization';
        if ($request->isSetSellerId()) {
            $parameters['SellerId'] =  $request->getSellerId();
        }
        if ($request->isSetAmazonAuthorizationId()) {
            $parameters['AmazonAuthorizationId'] =  $request->getAmazonAuthorizationId();
        }
        if ($request->isSetClosureReason()) {
            $parameters['ClosureReason'] =  $request->getClosureReason();
        }

        return $parameters;
    }