default mock data

intro:
  $ref: /patterns/form/checkout/checkout-list/checkout-list-intro
items:
  - $ref: /patterns/form/checkout/checkout-list/checkout-list-item#donation-amount
  - $ref: /patterns/form/checkout/checkout-list/checkout-list-item#personal-data
  - $ref: /patterns/form/checkout/checkout-list/checkout-list-item#payment
  - $ref: /patterns/form/checkout/checkout-list/checkout-list-item#gift

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