private static TransparentCryptoHelper createTransparentCryptoHelper()
    throws NoSuchMethodException, ClassNotFoundException {
    try {
      return createTransparentCryptoHelperWithoutHDFS12396();
    } catch (NoSuchMethodException e) {
      LOG.debug("No decryptEncryptedDataEncryptionKey method in DFSClient,"
        + " should be hadoop version with HDFS-12396", e);
    }
    return createTransparentCryptoHelperWithHDFS12396();
  }
Helper class for adding sasl support for {@link FanOutOneBlockAsyncDFSOutput}.
hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputSaslHelper.java