presto-main/src/main/java/io/prestosql/cost/StatsAndCosts.java/StatsAndCosts/StatsAndCosts
class StatsAndCosts:    @JsonCreator
    public StatsAndCosts(
            @JsonProperty("stats") Map<PlanNodeId, PlanNodeStatsEstimate> stats,
            @JsonProperty("costs") Map<PlanNodeId, PlanCostEstimate> costs)
    {
        this.stats = ImmutableMap.copyOf(requireNonNull(stats, "stats is null"));
        this.costs = ImmutableMap.copyOf(requireNonNull(costs, "costs is null"));
    }