blank = blank && ( sub == 0 );
        return blank;
    }


    /**
     * 
     * @return domain SID
     */
    @Override
    public SID getDomainSid () {
        return new SID(this, SID_TYPE_DOMAIN, this.domainName, null, getType() != SID_TYPE_DOMAIN);
    }


    /**
     * Get the RID
     * 
     * This is the last subauthority identifier

            try {
                final CIFSContext context = file.getContext();
                final SID[] children = context.getSIDResolver().getGroupMemberSids(context, file.getServer(), sid.getDomainSid(),
                        sid.getRid(), jcifs.smb.SID.SID_FLAG_RESOLVE_SIDS);
                for (final SID child : children) {
                    if (!sidSet.contains(child)) {

            for (int i = 0; i < this.sub_authority_count; i++) {
                this.sub_authority[i] = sid.sub_authority[i];
            }
        }
    }

    public SID getDomainSid() {
        return new SID(this,
                    SID_TYPE_DOMAIN,
                    this.domainName,
                    null,
                    getType() != SID_TYPE_DOMAIN);
    }