toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (country != null) 'country': country!,
if (locationId != null) 'locationId': locationId!,
if (ratePercent != null) 'ratePercent': ratePercent!,
if (shippingTaxed != null) 'shippingTaxed': shippingTaxed!,
if (useGlobalRate != null) 'useGlobalRate': useGlobalRate!,
};