String host, scope;
        int type;
        NbtAddress ans = null;
        InetAddress svr;
        UnknownHostException uhe;
    
        QueryThread( Sem sem, String host, int type,
                        String scope, InetAddress svr ) {
            super( "JCIFS-QueryThread: " + host );
            this.sem = sem;
            this.host = host;
            this.type = type;
            this.scope = scope;

     */
    @SuppressWarnings ( "unchecked" )
    @Override
    public <T extends Address> T unwrap ( Class<T> type ) {
        if ( this.addr instanceof Address ) {
            return ( (Address) this.addr ).unwrap(type);
        }
        else if ( this.getClass().isAssignableFrom(type) ) {
            return (T) this;
        }
        return null;
    }


    /**