presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/ForwardingJdbcClient.java/ForwardingJdbcClient/beginInsertTable
class ForwardingJdbcClient:    @Override
    public JdbcOutputTableHandle beginInsertTable(ConnectorSession session, JdbcTableHandle tableHandle)
    {
        return getDelegate().beginInsertTable(session, tableHandle);
    }