public function populate() {
        $this->addError(new GenericError(
            CanceledReasonCodes::BUYER_CANCELED,
            'BUYER_CANCELED',
            400,
            function ($message) {
                return $message;
            },
            __('The purchase was canceled', 'wcexaap')
        ));
        $this->addError(new GenericError(
            CanceledReasonCodes::EXPIRED,
            'EXPIRED',
            400,
            function ($message) {
                return $message;
            },
            __('The checkout session has expired. Please try again', 'wcexaap')
        ));
        $this->addError(new GenericError(
            CanceledReasonCodes::AMAZON_CANCELED,
            'AMAZON_CANCELED',
            503,
            function ($message) {
                return $message;
            },
            __('Amazon canceled the purchase due to service unavailability.', 'wcexaap')
        ));
        $this->addError(new GenericError(
            CanceledReasonCodes::DECLINED,
            'DECLINED',
            403,
            function ($message) {
                return $message;
            },
            __('The purchase was declined by Amazon.', 'wcexaap')
        ));
    }