@type t() :: %Duffel.Schema.Offer{
  available_airline_credit_ids: [String.t()],
  available_services: [map()],
  base_amount: String.t() | nil,
  base_currency: String.t() | nil,
  conditions: map() | nil,
  created_at: String.t() | nil,
  expires_at: String.t() | nil,
  id: String.t() | nil,
  intended_payment_methods: [String.t()],
  intended_services: [map()],
  live_mode: boolean() | nil,
  owner: map() | nil,
  partial: boolean() | nil,
  passenger_identity_documents_required: boolean() | nil,
  passengers: [Duffel.Schema.Passenger.t()],
  payment_requirements: map() | nil,
  private_fares: [map()],
  slices: [Duffel.Schema.Slice.t()],
  supported_loyalty_programmes: [String.t()],
  supported_passenger_identity_document_types: [String.t()],
  tax_amount: String.t() | nil,
  tax_currency: String.t() | nil,
  total_amount: String.t() | nil,
  total_currency: String.t() | nil,
  total_emissions_kg: String.t() | nil,
  updated_at: String.t() | nil
}