@type t() :: %Travel.Flights.Types.OrderChangeOffer{
  change_total_amount: String.t() | nil,
  change_total_currency: String.t() | nil,
  created_at: String.t() | nil,
  expires_at: String.t() | nil,
  id: String.t() | nil,
  new_total_amount: String.t() | nil,
  new_total_currency: String.t() | nil,
  order_change_id: (String.t() | nil) | nil,
  order_id: (String.t() | nil) | nil,
  penalty_total_amount: String.t() | nil,
  penalty_total_currency: String.t() | nil,
  refund_to: (atom() | nil) | nil,
  slices: Travel.Flights.Types.OrderChangeOfferSlices.t() | nil,
  updated_at: (String.t() | nil) | nil
}