presto-main/src/main/java/io/prestosql/execution/resourcegroups/InternalResourceGroup.java/InternalResourceGroup/getSummaryInfo
class InternalResourceGroup:    private ResourceGroupInfo getSummaryInfo()
    {
        synchronized (root) {
            return new ResourceGroupInfo(
                    id,
                    getState(),
                    schedulingPolicy,
                    schedulingWeight,
                    succinctBytes(softMemoryLimitBytes),
                    softConcurrencyLimit,
                    hardConcurrencyLimit,
                    maxQueuedQueries,
                    succinctBytes(cachedResourceUsage.getMemoryUsageBytes()),
                    succinctDuration(cachedResourceUsage.getCpuUsageMillis(), MILLISECONDS),
                    getQueuedQueries(),
                    getRunningQueries(),
                    eligibleSubGroups.size(),
                    Optional.empty(),
                    Optional.empty());
        }
    }