presto-main/src/main/java/io/prestosql/operator/WorkProcessorSourceOperatorFactory.java/WorkProcessorSourceOperatorFactory/create
class WorkProcessorSourceOperatorFactory:    WorkProcessorSourceOperator create(
            Session session,
            MemoryTrackingContext memoryTrackingContext,
            DriverYieldSignal yieldSignal,
            WorkProcessor<Split> splits);