docs: private Hashtable<String, ?> getUniqueIdAndSecurityNameHashtableFromSubject(final Subject subject) {
          final String[] properties = { AttributeNameConstants.WSCREDENTIAL_UNIQUEID,
                                        AttributeNameConstants.WSCREDENTIAL_SECURITYNAME };
          SubjectHelper subjectHelper = new SubjectHelper();
          return subjectHelper.getHashtableFromSubject(subject, properties);
      }