void awaitBlobUpdates(String blobId, UpdateType updateType) {
    try {
      waitForTracker(blobId);
      if (!objectTracker.get(blobId).awaitBlobUpdates(updateType)) {
        Assert.fail("Failed awaiting for " + blobId + " updates of type " + updateType);
      }
    } catch (InterruptedException e) {
      // ignore
    }
  }
Waits for blob updates of type {@code updateType} on all replicas for {@code blobId}
@param blobId the ID of the blob
@param updateType the {@link UpdateType} to wait for
ambry-test-utils/src/main/java/com/github/ambry/server/MockNotificationSystem.java