@type t() :: %PolarExpress.Schemas.DiscountFixedOnceForeverDurationBase{
  amount: term(),
  amounts: term(),
  code: term(),
  created_at: term(),
  currency: term(),
  duration: term(),
  ends_at: term(),
  id: term(),
  max_redemptions: term(),
  metadata: term(),
  modified_at: term(),
  name: term(),
  organization_id: term(),
  redemptions_count: term(),
  starts_at: term(),
  type: term()
}