protected HRegion getRegion(final byte[] regionName) throws NotServingRegionException {
    String encodedRegionName = RegionInfo.encodeRegionName(regionName);
    return getRegionByEncodedName(regionName, encodedRegionName);
  }
Protected Utility method for safely obtaining an HRegion handle.
@param regionName Name of online {@link HRegion} to return
@return {@link HRegion} for <code>regionName</code>
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java