Representing the status of an invoice.
## Enum
* `PENDING` (value: `"PENDING"`)
* `PAID` (value: `"PAID"`)
* `SETTLED` (value: `"SETTLED"`)
* `EXPIRED` (value: `"EXPIRED"`)
* `XENDIT_ENUM_DEFAULT_FALLBACK` (value: `UNKNOWN_ENUM_VALUE`)
If you encounter UNKNOWN_ENUM_VALUE, it means that this ENUM is unavailable in your current SDK version. Please upgrade to get the newest ENUM.