public BlobServiceClient getStorageSyncClient() {
    if (storageSyncClientRef == null) {
      storageSyncClientRef = new AtomicReference<>(createBlobStorageSyncClient());
    }
    return storageSyncClientRef.get();
  }
Returns a sync client to Azure blob storage
@return the underlying {@link BlobServiceAsyncClient}.
ambry-cloud/src/main/java/com/github/ambry/cloud/azure/StorageClient.java