@type t() :: %PolarExpress.Schemas.Refund{
  amount: integer() | nil,
  created_at: DateTime.t() | nil,
  currency: String.t() | nil,
  customer_id: String.t() | nil,
  dispute: PolarExpress.Schemas.RefundDispute.t() | nil,
  id: String.t() | nil,
  metadata: PolarExpress.Schemas.MetadataOutputType.t() | nil,
  modified_at: DateTime.t() | nil,
  order_id: String.t() | nil,
  organization_id: String.t() | nil,
  reason: PolarExpress.Schemas.RefundReason.t() | nil,
  revoke_benefits: boolean() | nil,
  status: PolarExpress.Schemas.RefundStatus.t() | nil,
  subscription_id: String.t() | nil,
  tax_amount: integer() | nil
}