How to use

CustomFieldApiException

in

com.ning.billing.util.api

@Override
protected CustomFieldApiException generateAlreadyExistsException(final CustomFieldModelDao entity, final InternalCallContext context) {
  return new CustomFieldApiException(ErrorCode.CUSTOM_FIELD_ALREADY_EXISTS, entity.getId());
}

throw new CustomFieldApiException(ErrorCode.CUSTOM_FIELD_ALREADY_EXISTS, match.getId());