@Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (!(o instanceof StoreFileReference)) {
        return false;
      }
      StoreFileReference other = (StoreFileReference) o;
      return regionName.equals(other.regionName) && familyToFiles.equals(other.familyToFiles);
    }
A reference to a collection of files in the archive directory for a single region.
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/FileArchiverNotifierImpl.java