BlobProperties getBlobProperties() {
    if (finalBlobProperties == null) {
      throw new IllegalStateException("blob properties has not yet been finalized");
    }
    return finalBlobProperties;
  }
Return the {@link BlobProperties} associated with this operation.
@return the {@link BlobProperties} associated with this operation.
ambry-router/src/main/java/com/github/ambry/router/PutOperation.java