@type t() :: %Travel.Flights.Types.OfferSlice{
  conditions: Travel.Flights.Types.OfferSliceCondition.t() | nil,
  destination: map() | nil,
  destination_type: atom() | nil,
  duration: String.t() | nil,
  fare_brand_name: (String.t() | nil) | nil,
  id: String.t() | nil,
  ngs_shelf: (integer() | nil) | nil,
  origin: map() | nil,
  origin_type: atom() | nil,
  segments: [Travel.Flights.Types.OfferSliceSegment.t()] | nil
}