.name("LineItem Filter")
.build();
lineItemFilter.setDegreeOfParallelism(this.degreeOfParallelism);
ReduceOperator groupByReturnFlag =
ReduceOperator.builder(new GroupByReturnFlag(), StringValue.class, 0)
.name("groupyBy")
.build();
lineItemFilter.setInput(lineItems);
groupByReturnFlag.setInput(lineItemFilter);