BillingAddress.fromJson constructor
Implementation
BillingAddress.fromJson(Map<String, dynamic> json) {
addressLine1 = json['address_line1'] as String?;
addressLine2 = json['address_line2'] as String?;
city = json['city'] as String?;
state = json['state'] as String?;
zip = json['zip'] as String?;
country = json['country'] as String?;
}