@Override
  public void init(Checkpoint checkpoint) {
    // By default, init without retrying deleted SnapshotIndex blob. We want the init to fail if the SnapshotIndex blob
    // was deleted. This allows us to mark the task for a full restore in restore().
    init(checkpoint, false);
  }
Map of store name and Pair of blob id of SnapshotIndex and the corresponding SnapshotIndex from last successful
task checkpoint
samza-core/src/main/java/org/apache/samza/storage/blobstore/BlobStoreRestoreManager.java