private void insertAccountAndContainer(RestRequest restRequest, Account account, Container container) {
    if (account != null && container != null) {
      restRequest.setArg(RestUtils.InternalKeys.TARGET_ACCOUNT_KEY, account);
      restRequest.setArg(RestUtils.InternalKeys.TARGET_CONTAINER_KEY, container);
    }
  }
Inserts the given {@code account} and {@code container} in {@code restRequest}.
@param restRequest the {@link RestRequest} to insert the objects into.
@param account the {@link Account} to insert.
@param container the {@link Container} to insert.
ambry-frontend/src/test/java/com/github/ambry/frontend/AmbrySecurityServiceTest.java