@type t() :: %Inttegro.ProductShipment{
  delivery: %{optional(String.t()) => term()} | nil,
  download: %{optional(String.t()) => term()} | nil,
  render: %{optional(String.t()) => term()} | nil,
  service: %{optional(String.t()) => term()} | nil,
  stream: %{optional(String.t()) => term()} | nil,
  type: Inttegro.ProductShipmentType.t()
}