- .add(Rfc6020Mapping.BASE, 0, 1)
- .add(Rfc6020Mapping.DESCRIPTION, 0, 1)
- .add(Rfc6020Mapping.REFERENCE, 0, 1)
- .add(Rfc6020Mapping.STATUS, 0, 1)
+ .addOptional(Rfc6020Mapping.BASE)
+ .addOptional(Rfc6020Mapping.DESCRIPTION)
+ .addOptional(Rfc6020Mapping.REFERENCE)
+ .addOptional(Rfc6020Mapping.STATUS)