presto-main/src/main/java/io/prestosql/operator/ExchangeOperator.java/ExchangeOperatorFactory/ExchangeOperatorFactory
class ExchangeOperatorFactory:        public ExchangeOperatorFactory(
                int operatorId,
                PlanNodeId sourceId,
                ExchangeClientSupplier exchangeClientSupplier,
                PagesSerdeFactory serdeFactory)
        {
            this.operatorId = operatorId;
            this.sourceId = sourceId;
            this.exchangeClientSupplier = exchangeClientSupplier;
            this.serdeFactory = serdeFactory;
        }