protected void onAccountUpdateNotification(Collection<Account> updatedAccounts) {
    quotaMetrics.accountUpdateNotificationCount.inc(updatedAccounts.size());
    quotaEnforcers.stream()
        .map(QuotaEnforcer::getQuotaSource)
        .filter(Objects::nonNull)
        .forEach(quotaSource -> quotaSource.updateNewQuotaResources(updatedAccounts));
  }
Notify {@link QuotaSource}s about creation of new Ambry {@link Account} or {@link com.github.ambry.account.Container}.
Note that this method can also get notification about changes to account or container unrelated to quota.
@param updatedAccounts {@link Collection} of {@link Account}s updated.
ambry-quota/src/main/java/com/github/ambry/quota/AmbryQuotaManager.java