presto-main/src/main/java/io/prestosql/execution/scheduler/SourcePartitionedScheduler.java/SourcePartitionedScheduler/newSourcePartitionedSchedulerAsSourceScheduler
class SourcePartitionedScheduler:    public static SourceScheduler newSourcePartitionedSchedulerAsSourceScheduler(
            SqlStageExecution stage,
            PlanNodeId partitionedNode,
            SplitSource splitSource,
            SplitPlacementPolicy splitPlacementPolicy,
            int splitBatchSize,
            boolean groupedExecution)
    {
        return new SourcePartitionedScheduler(stage, partitionedNode, splitSource, splitPlacementPolicy, splitBatchSize, groupedExecution);
    }