Billing constructor

const Billing({ String apartment = "803", String email = "[e-mail]", String floor = "42", String firstName = "Ahmed", String street = "Tahrir Street", String building = "8028", String phoneNumber = "[phone]", String shippingMethod = "PKG", String postalCode = "01898", String city = "Cairo", String country = "EG", String lastName = "Ali", String state = "Cairo", })

Implementation

const Billing({
  this.apartment = "803",
  this.email = "[e-mail]",
  this.floor = "42",
  this.firstName = "Ahmed",
  this.street = "Tahrir Street",
  this.building = "8028",
  this.phoneNumber = "[phone]",
  this.shippingMethod = "PKG",
  this.postalCode = "01898",
  this.city = "Cairo",
  this.country = "EG",
  this.lastName = "Ali",
  this.state = "Cairo",
});