String getContinuationTokenForBlob(BlobId blobId) {
      return blobIdToContinuationTokenMap.get(blobId);
    }
Return continuation token for specified {@link BlobId}
@param blobId {@link BlobId} object.
@return continuation token.
ambry-vcr/src/test/java/com/github/ambry/vcr/LatchBasedInMemoryCloudDestination.java