presto-main/src/main/java/io/prestosql/operator/TableWriterOperator.java/TableWriterOperatorFactory/duplicate
class TableWriterOperatorFactory:        @Override
        public OperatorFactory duplicate()
        {
            return new TableWriterOperatorFactory(operatorId, planNodeId, pageSinkManager, target, columnChannels, session, statisticsAggregationOperatorFactory, types);
        }