presto-main/src/main/java/io/prestosql/operator/TableFinishOperator.java/TableFinishOperator/createOperator
class TableFinishOperator:        @Override
        public Operator createOperator(DriverContext driverContext)
        {
            checkState(!closed, "Factory is already closed");
            OperatorContext context = driverContext.addOperatorContext(operatorId, planNodeId, TableFinishOperator.class.getSimpleName());
            Operator statisticsAggregationOperator = statisticsAggregationOperatorFactory.createOperator(driverContext);
            boolean statisticsCpuTimerEnabled = !(statisticsAggregationOperator instanceof DevNullOperator) && isStatisticsCpuTimerEnabled(session);
            return new TableFinishOperator(context, tableFinisher, statisticsAggregationOperator, descriptor, statisticsCpuTimerEnabled);
        }