presto-main/src/main/java/io/prestosql/operator/DevNullOperator.java/DevNullOperator/createOperator
class DevNullOperator:        @Override
        public Operator createOperator(DriverContext driverContext)
        {
            return new DevNullOperator(driverContext.addOperatorContext(operatorId, planNodeId, DevNullOperator.class.getSimpleName()));
        }