@type t() :: %Inttegro.CreateRefundRequest{
  custom_data: %{optional(String.t()) => String.t()} | nil,
  line_items: [Inttegro.CreateRefundLineItemInput.t()],
  order_id: String.t(),
  reason: Inttegro.RefundReason.t(),
  reason_details: String.t() | nil,
  reference: String.t() | nil,
  request_meta: Inttegro.RefundRequestMetaInput.t() | nil
}