presto-main/src/main/java/io/prestosql/operator/WorkProcessorPipelineSourceOperator.java/WorkProcessorPipelineSourceOperator/WorkProcessorOperatorContext
class WorkProcessorPipelineSourceOperator:        private WorkProcessorOperatorContext(
                WorkProcessorOperator operator,
                int operatorId,
                PlanNodeId planNodeId,
                String operatorType,
                MemoryTrackingContext memoryTrackingContext)
        {
            this.operator = operator;
            this.operatorId = operatorId;
            this.planNodeId = planNodeId;
            this.operatorType = operatorType;
            this.memoryTrackingContext = memoryTrackingContext;
        }