presto-main/src/main/java/io/prestosql/sql/planner/NodePartitioningManager.java/NodePartitioningManager/NodePartitioningManager
class NodePartitioningManager:    @Inject
    public NodePartitioningManager(NodeScheduler nodeScheduler)
    {
        this.nodeScheduler = requireNonNull(nodeScheduler, "nodeScheduler is null");
    }