@type t() :: %BexioApiClient.Purchase.Expense{
  address: BexioApiClient.Purchase.Address.t() | nil,
  amount: float() | nil,
  attachment_ids: [String.t()],
  bank_account_id: integer() | nil,
  base_currency_amount: float() | nil,
  base_currency_code: String.t() | nil,
  booking_account_id: integer() | nil,
  created_at: DateTime.t() | NaiveDateTime.t() | nil,
  currency_code: String.t(),
  document_no: String.t() | nil,
  exchange_rate: float() | nil,
  firstname_suffix: String.t() | nil,
  gross: float() | nil,
  id: String.t() | nil,
  invoice_id: String.t() | nil,
  lastname_company: String.t() | nil,
  net: float() | nil,
  paid_on: Date.t(),
  project_id: String.t() | nil,
  status: :draft | :done,
  supplier_id: integer() | nil,
  tax_calc: float() | nil,
  tax_id: integer() | nil,
  tax_man: float() | nil,
  title: String.t() | nil,
  transaction_id: String.t() | nil,
  vendor: String.t() | nil,
  vendor_ref: String.t() | nil
}