@Override
    public SID getOwnerGroup ( boolean resolve ) throws IOException {
        try ( SmbTreeHandleImpl th = ensureTreeConnected() ) {
            SecurityDescriptor desc = querySecurity(th, SecurityInfo.GROUP_SECURITY_INFO);
            SID ownerGroup = desc.getOwnerGroupSid();
            if ( ownerGroup == null ) {
                return null;
            }

        send(request, response);

        close(f, 0L);

        response.securityDescriptor.owner_group.resolve(getServerWithDfs(), auth);
        return response.securityDescriptor.owner_group;
    }