presto-main/src/main/java/io/prestosql/operator/TableScanOperator.java/TableScanOperatorFactory/create
class TableScanOperatorFactory:        @Override
        public WorkProcessorSourceOperator create(
                Session session,
                MemoryTrackingContext memoryTrackingContext,
                DriverYieldSignal yieldSignal,
                WorkProcessor<Split> splits)
        {
            return new TableScanWorkProcessorOperator(
                    session,
                    memoryTrackingContext,
                    splits,
                    pageSourceProvider,
                    table,
                    columns);
        }