KeyStore: rename scan() to saw().

        return contains(key.getBytes());

    }

    public byte[][] scan(byte[] prefix) {

    public byte[][] saw(byte[] prefix) {

        return execute('s', prefix);

    }

    public String[] scan(String prefix) {

        byte[][] values = scan(prefix.getBytes());

    public String[] saw(String prefix) {

        byte[][] values = saw(prefix.getBytes());

        if (values == null) {

            return null;

        }