private synchronized HbckRegionInfo getOrCreateInfo(String name) {
    HbckRegionInfo hbi = regionInfoMap.get(name);
    if (hbi == null) {
      hbi = new HbckRegionInfo(null);
      regionInfoMap.put(name, hbi);
    }
    return hbi;
  }
Gets the entry in regionInfo corresponding to the the given encoded region name. If the region
has not been seen yet, a new entry is added and returned.
hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java