@Override
    public boolean equals(Object o) {
      if (o == this) {
        return true;
      }
      if (!(o instanceof BlobIDAndVersion)) {
        return false;
      }
      BlobIDAndVersion other = (BlobIDAndVersion) o;
      return blobID.equals(other.blobID) && version == other.version;
    }
Return blob id.
@return Blob id.
ambry-account/src/main/java/com/github/ambry/account/RouterStore.java