@Override
    public String toString() {
      return "[" + Bytes.toString(start) + ", " + Bytes.toString(end) + "]";
    }
This is range uses a user specified start and end keys. It also has an extra tiebreaker so that
different ranges with the same start/end key pair count as different regions.
hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionSplitCalculator.java