Category of channel code, as some channels might require more fields during processing
* `Bank` (value: `'BANK'`)
* `Ewallet` (value: `'EWALLET'`)
* `Otc` (value: `'OTC'`)
* `XenditEnumDefaultFallback` (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.