void verifyAccountAndContainerHeaders(String accountName, String containerName, HttpResponse response) {
    String accountNameInResponse = response.headers().get(TARGET_ACCOUNT_NAME);
    String containerNameInResponse = response.headers().get(RestUtils.Headers.TARGET_CONTAINER_NAME);
    if (accountName != null && containerName != null) {
      assertEquals("Account name does not match that to which blob was uploaded", accountName, accountNameInResponse);
      assertEquals("Container name does not match that to which blob was uploaded", containerName,
          containerNameInResponse);
    } else {
      assertNull("Response should not have any account name - has " + accountNameInResponse, accountNameInResponse);
      assertNull("Response should not have any container name - has " + containerNameInResponse,
          containerNameInResponse);
    }
  }
Verifies the account and container headers in the response
@param accountName the expected account name in {@code response}.
@param containerName the expected container name in {@code response}.
@param response the response received from Ambry.
ambry-frontend/src/integration-test/java/com/github/ambry/frontend/FrontendIntegrationTestBase.java