toJson method
Implementation
@override
Map<String, Object?> toJson() => {
if (message != null) "message": encodeValue(message),
if (fixCode != null) "fix_code": encodeValue(fixCode),
if (detail != null) "detail": encodeValue(detail),
if (cause != null) "cause": encodeValue(cause),
"type": encodeValue(type),
"code": encodeValue(code),
"url": encodeValue(url),
};