default Collection<Container> updateContainers(String accountName, Collection<Container> containers)
      throws AccountServiceException {
    throw new UnsupportedOperationException("This method is not supported");
  }
Add or update a collection of containers in an existing account.
@param accountName the name of account which container belongs to.
@param containers a collection of new or modified {@link Container}s.
@return a collection of added or modified containers.
@throws AccountServiceException if an exception occurs.
ambry-api/src/main/java/com/github/ambry/account/AccountService.java