- .add(Rfc6020Mapping.DESCRIPTION, 0, 1)
- .add(Rfc6020Mapping.ERROR_APP_TAG, 0, 1)
- .add(Rfc6020Mapping.ERROR_MESSAGE, 0, 1)
- .add(Rfc6020Mapping.REFERENCE, 0, 1)
+ .addOptional(Rfc6020Mapping.DESCRIPTION)
+ .addOptional(Rfc6020Mapping.ERROR_APP_TAG)
+ .addOptional(Rfc6020Mapping.ERROR_MESSAGE)
+ .addOptional(Rfc6020Mapping.REFERENCE)