private Pair<Account, Container> getAccountAndContainer(BlobProperties blobProperties) {
    Account account = ACCOUNT_SERVICE.getAccountById(blobProperties.getAccountId());
    Container container = account.getContainerById(blobProperties.getContainerId());
    return new Pair<>(account, container);
  }
@param blobProperties the {@link BlobProperties} to read.
@return the {@link Account} and {@link Container} objects corresponding to the IDs in the {@link BlobProperties}.
ambry-frontend/src/test/java/com/github/ambry/frontend/AmbrySecurityServiceTest.java