@type t() :: %Stripe.Params.InvoiceItemCreateParams{
  amount: integer() | nil,
  currency: String.t() | nil,
  customer: String.t() | nil,
  customer_account: String.t() | nil,
  description: String.t() | nil,
  discountable: boolean() | nil,
  discounts: map() | nil,
  expand: [String.t()] | nil,
  invoice: String.t() | nil,
  metadata: map() | nil,
  period: Stripe.Params.InvoiceItemCreateParams.Period.t() | nil,
  price_data: Stripe.Params.InvoiceItemCreateParams.PriceData.t() | nil,
  pricing: Stripe.Params.InvoiceItemCreateParams.Pricing.t() | nil,
  quantity: integer() | nil,
  subscription: String.t() | nil,
  tax_behavior: String.t() | nil,
  tax_code: map() | nil,
  tax_rates: [String.t()] | nil,
  unit_amount_decimal: String.t() | nil
}