@type t() :: %PolarExpress.Schemas.Order{
  applied_balance_amount: integer() | nil,
  billing_address: PolarExpress.Schemas.Address.t() | nil,
  billing_name: String.t() | nil,
  billing_reason: PolarExpress.Schemas.OrderBillingReason.t() | nil,
  checkout_id: String.t() | nil,
  created_at: DateTime.t() | nil,
  currency: String.t() | nil,
  custom_field_data:
    %{
      required(String.t()) =>
        String.t() | integer() | boolean() | DateTime.t() | nil
    }
    | nil,
  customer: PolarExpress.Schemas.OrderCustomer.t() | nil,
  customer_id: String.t() | nil,
  description: String.t() | nil,
  discount:
    PolarExpress.Schemas.DiscountFixedOnceForeverDurationBase.t()
    | PolarExpress.Schemas.DiscountFixedRepeatDurationBase.t()
    | PolarExpress.Schemas.DiscountPercentageOnceForeverDurationBase.t()
    | PolarExpress.Schemas.DiscountPercentageRepeatDurationBase.t()
    | nil,
  discount_amount: integer() | nil,
  discount_id: String.t() | nil,
  due_amount: integer() | nil,
  id: String.t() | nil,
  invoice_number: String.t() | nil,
  is_invoice_generated: boolean() | nil,
  items: [PolarExpress.Schemas.OrderItemSchema.t()] | nil,
  metadata: PolarExpress.Schemas.MetadataOutputType.t() | nil,
  modified_at: DateTime.t() | nil,
  net_amount: integer() | nil,
  paid: boolean() | nil,
  platform_fee_amount: integer() | nil,
  platform_fee_currency: String.t() | nil,
  product: PolarExpress.Schemas.OrderProduct.t() | nil,
  product_id: String.t() | nil,
  refunded_amount: integer() | nil,
  refunded_tax_amount: integer() | nil,
  seats: integer() | nil,
  status: PolarExpress.Schemas.OrderStatus.t() | nil,
  subscription: PolarExpress.Schemas.OrderSubscription.t() | nil,
  subscription_id: String.t() | nil,
  subtotal_amount: integer() | nil,
  tax_amount: integer() | nil,
  total_amount: integer() | nil,
  user_id: String.t() | nil
}