public function populate() {
        $this->addError(new GenericError(
            self::TRANSACTION_AMOUNT_EXCEEDED,
            $this->getConstantNameByValue(self::TRANSACTION_AMOUNT_EXCEEDED),
            400,
            function ($message) {
                return $message;
            },
            __('You\'ve exceeded the maximum refund amount allowed for this Refund', 'wcexaap')
        ));

        $this->addError(new GenericError(
            self::INVALID_CHARGE_STATUS,
            $this->getConstantNameByValue(self::INVALID_CHARGE_STATUS),
            422,
            function ($message) {
                return $message;
            },
            __('You tried to call a Refund operation on a Charge that is not in a Completed state. Check the Charge status for more information', 'wcexaap')
        ));

        $this->addError(new GenericError(
            self::TRANSACTION_COUNT_EXCEEDED,
            $this->getConstantNameByValue(self::TRANSACTION_COUNT_EXCEEDED),
            422,
            function ($message) {
                return $message;
            },
            __('You\'ve exceeded the maximum limit of 10 Refunds per Charge', 'wcexaap')
        ));

        $this->addError(new GenericError(
            self::AMAZON_REJECTED,
            $this->getConstantNameByValue(self::AMAZON_REJECTED),
            422,
            function ($message) {
                return $message;
            },
            __('Amazon has rejected the refund. You should issue a refund to the buyer in an alternate manner (for example, a gift card or store credit)', 'wcexaap')
        ));

        $this->addError(new GenericError(
            self::PROCESSING_FAILURE,
            $this->getConstantNameByValue(self::PROCESSING_FAILURE),
            500,
            function ($message) {
                return $message;
            },
            __('Amazon could not process the transaction because of an internal processing error or because the buyer has already received a refund from an A-to-z claim or a chargeback. You should only retry the Refund if the Charge object is in the Captured state. Otherwise, you should refund the buyer in an alternative way (for example, a store credit or a check)', 'wcexaap')
        ));
    }