Fallback response for array list

[gcatanese]

The fallback response is empty when the response example returns a list of items

        200:
          description: OK - the request has succeeded.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/PaymentMethod'
              examples:
                list-payment-methods:
                  $ref: '#/components/examples/list-payment-methods'