@Override
  public CompletableFuture<Void> downloadBlobAsync(BlobId blobId, OutputStream outputStream) {
    throw new UnsupportedOperationException("downloadBlobAsync will not be implemented for AzureCloudDestinationSync");
  }
Uploads a stream of blobs to Azure cloud
@param messageSetToWrite Messages replicated from servr
@return Unused boolean
@throws CloudStorageException
ambry-cloud/src/main/java/com/github/ambry/cloud/azure/AzureCloudDestinationSync.java