@Override
  public String toString() {
    return "DirIndex{" +
        "dirName='" +
        dirName + '\'' +
        ", filesPresent=" + filesPresent +
        ", filesRemoved=" + filesRemoved +
        ", subDirsPresent=" + subDirsPresent +
        ", subDirsRemoved=" + subDirsRemoved +
        '}';
  }
Representation of a directory in the blob store
samza-core/src/main/java/org/apache/samza/storage/blobstore/index/DirIndex.java