public void addContainerStorageStats(short accountId, ContainerStorageStats stats) {
    storageStats.computeIfAbsent(accountId, k -> new HashMap<>()).put(stats.getContainerId(), stats);
  }
Add container storage stats to this {@link AggregatedAccountStorageStats}.
@param accountId The account id
@param stats The container stats
ambry-api/src/main/java/com/github/ambry/server/storagestats/AggregatedAccountStorageStats.java