old_contents: import DS from 'ember-data';
  const { Model, attr, belongsTo } = DS;
  
  export default Model.extend({
    amount: attr('number'),
    order: belongsTo('order'),
    paymentMethod: belongsTo('payment-method'),
    token: attr('string'),
    cardNumber: attr('string'),
    cardholder: attr('string'),
    validFrom: attr('string'),
    expiryDate: attr('string'),
    issueNumber: attr('string'),
    cvv: attr('string')
  });
  
new_contents: import DS from 'ember-data';
  const { Model, attr, belongsTo } = DS;
  
  export default Model.extend({
    amount: attr('number'),
    order: belongsTo('order'),
    paymentMethod: belongsTo('payment-method'),
    token: attr('string'),
    cardNumber: attr('string'),
    cardholder: attr('string'),
    cardType: attr('string'),
    validFrom: attr('string'),
    expiryDate: attr('string'),
    issueNumber: attr('string'),
    cvv: attr('string')
  });
  
subject: Add cardType to payment model