@Override
    public boolean isValid(int timeout) throws SQLException {
        checkOpen();
        if (timeout < 0) {
            throw new SQLException("Timeout must be >= 0", ExceptionUtils.SQL_STATE_CLIENT_ERROR);
        }

        //TODO: This is a placeholder implementation
        return true;
    }
Returns configuration for current connection. Changes made to the instance of configuration may have side effects.
Application should avoid making changes to this object until it is documented.
@return - reference to internal instance of JdbcConfiguration
jdbc-v2/src/main/java/com/clickhouse/jdbc/ConnectionImpl.java