presto-benchmark/src/main/java/io/prestosql/benchmark/HandTpchQuery1.java/HandTpchQuery1/TpchQuery1Operator
class HandTpchQuery1:        public TpchQuery1Operator(OperatorContext operatorContext)
        {
            this.operatorContext = requireNonNull(operatorContext, "operatorContext is null");
            this.pageBuilder = new PageBuilder(TYPES);
        }