protected HRegion initHRegion(TableName tableName, byte[] startKey, byte[] stopKey,
    Configuration conf, boolean isReadOnly, Durability durability, WAL wal, byte[]... families)
    throws IOException {
    ChunkCreator.initialize(MemStoreLAB.CHUNK_SIZE_DEFAULT, false, 0, 0, 0, null,
      MemStoreLAB.INDEX_CHUNK_SIZE_PERCENTAGE_DEFAULT);
    return TEST_UTIL.createLocalHRegion(tableName, startKey, stopKey, conf, isReadOnly, durability,
      wal, families);
  }
@return A region on which you must call {@link HBaseTestingUtil#closeRegionAndWAL(HRegion)}
        when done.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java