@type t() :: %Inttegro.PurchaseIntentVariantSet{
  active: boolean(),
  default_product_id: String.t() | nil,
  description: String.t() | nil,
  id: String.t(),
  name: String.t(),
  reference: String.t() | nil,
  variant_axes: [Inttegro.PurchaseIntentVariantAxis.t()],
  variants: [Inttegro.PurchaseIntentVariant.t()]
}