public List<Pair<RegionInfo, RegionInfo>> getOverlaps() {
    return this.overlaps;
  }
@return Overlap pairs found as we scanned hbase:meta; ordered by hbase:meta table sort. Pairs
        of overlaps may have overlap with subsequent pairs.
@see MetaFixer#calculateMerges(int, List) where we aggregate overlaps for a single 'merge'
     call.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/janitor/CatalogJanitorReport.java