@Override
      public AtomicBoolean getFallbackToSimpleAuth(SaslDataTransferClient saslClient) {
        try {
          return (AtomicBoolean) fallbackToSimpleAuthField.get(saslClient);
        } catch (IllegalAccessException e) {
          throw new RuntimeException(e);
        }
      }
Helper class for adding sasl support for {@link FanOutOneBlockAsyncDFSOutput}.
hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputSaslHelper.java