presto-blackhole/src/main/java/io/prestosql/plugin/blackhole/BlackHoleNodePartitioningProvider.java/BlackHoleNodePartitioningProvider/BlackHoleNodePartitioningProvider
class BlackHoleNodePartitioningProvider:    public BlackHoleNodePartitioningProvider(NodeManager nodeManager)
    {
        this.nodeManager = requireNonNull(nodeManager, "nodeManager is null");
    }