presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/ForwardingJdbcClient.java/ForwardingJdbcClient/getPreparedStatement
class ForwardingJdbcClient:    @Override
    public PreparedStatement getPreparedStatement(Connection connection, String sql)
            throws SQLException
    {
        return getDelegate().getPreparedStatement(connection, sql);
    }