private function _convertValidateBillingAgreement($request) {
    
        $parameters = array();
        $parameters['Action'] = 'ValidateBillingAgreement';
        if ($request->isSetAmazonBillingAgreementId()) {
            $parameters['AmazonBillingAgreementId'] =  $request->getAmazonBillingAgreementId();
        }
        if ($request->isSetSellerId()) {
            $parameters['SellerId'] =  $request->getSellerId();
        }
    
        return $parameters;
    }