@type t() :: %Inttegro.CreateOrderExistingCustomerInput{
  billing_details: Inttegro.BillingDetailsInput.t() | nil,
  checkout_settings:
    Inttegro.CreateOrderExistingCustomerInputCheckoutSettings.t() | nil,
  custom_data: %{optional(String.t()) => String.t()} | nil,
  customer_id: String.t(),
  execute_payment: boolean() | nil,
  finalize: boolean() | nil,
  invoice_settings: Inttegro.InvoiceSettingsInput.t() | nil,
  line_items: [term()],
  payment_method_data: Inttegro.PaymentMethodDataInput.t() | nil,
  payment_method_id: String.t() | nil,
  payout_settings: Inttegro.OrderPayoutSettingsRequest.t() | nil,
  receipt_number: String.t() | nil,
  request_meta: Inttegro.CreateOrderExistingCustomerInputRequestMeta.t() | nil,
  shipping: Inttegro.ShippingInput.t() | nil,
  statement_descriptor: String.t() | nil,
  statement_descriptor_prefix: String.t() | nil
}