presto-main/src/main/java/io/prestosql/operator/TableFinishOperator.java/TableFinishOperatorFactory/duplicate
class TableFinishOperatorFactory:        @Override
        public OperatorFactory duplicate()
        {
            return new TableFinishOperatorFactory(operatorId, planNodeId, tableFinisher, statisticsAggregationOperatorFactory, descriptor, session);
        }