if (wasNullColumnIndex == -1) {
if (!wasNullValid) {
    public boolean wasNull() throws  SQLException {        if (wasNullColumnIndex == -1) {            throw new SQLException("look at a column before testing null!");        }        if (row == null) {            throw new SQLException("No row available for wasNull!");        }        return row[wasNullColumnIndex - 1] == null;    }