code: static byte[][] splitHdfsStatsKey(byte[] rawKey) {
      byte[][] splits = ByteUtil.split(rawKey, HdfsConstants.SEP_BYTES,
            HdfsConstants.NUM_HDFS_USAGE_ROWKEY_COMPONENTS);
      return splits;
    }
docs: Handles splitting the encoded hdfsStats key
  
  @param rawKey byte encoded representation of the path key
  @return