presto-main/src/main/java/io/prestosql/operator/exchange/LocalExchangeSinkOperator.java/LocalExchangeSinkOperatorFactory/duplicate
class LocalExchangeSinkOperatorFactory:        @Override
        public OperatorFactory duplicate()
        {
            return new LocalExchangeSinkOperatorFactory(localExchangeFactory, operatorId, planNodeId, localExchangeFactory.newSinkFactoryId(), pagePreprocessor);
        }