presto-benchmark/src/main/java/io/prestosql/benchmark/HandTpchQuery1.java/TpchQuery1Operator/createOperator
class TpchQuery1Operator:            @Override
            public Operator createOperator(DriverContext driverContext)
            {
                OperatorContext operatorContext = driverContext.addOperatorContext(operatorId, new PlanNodeId("test"), TpchQuery1Operator.class.getSimpleName());
                return new TpchQuery1Operator(operatorContext);
            }