demo-process-models/playground/myome/pizza-kingdom-silvia/payment-form-schema.json

{
  "title": "Please select a payment option",
  "description": "Payment options",
  "type": "object",
  "properties": {
    "payment_type": {
      "type": "string",
      "enum": [
          "cash",
          "credit"
      ]
      },
      "uniqueItems": true
    }
  }
}