code: public static JavaRDD<List<List<Writable>>> zeroMeanUnitVarianceSequence(Schema schema,
                      JavaRDD<List<List<Writable>>> sequence, List<String> excludeColumns) {
          DataRowsFacade frame = DataFrames.toDataFrameSequence(schema, sequence);
          if (excludeColumns == null)
              excludeColumns = Arrays.asList(DataFrames.SEQUENCE_UUID_COLUMN, DataFrames.SEQUENCE_INDEX_COLUMN);
          else {
              excludeColumns = new ArrayList<>(excludeColumns);
              excludeColumns.add(DataFrames.SEQUENCE_UUID_COLUMN);
              excludeColumns.add(DataFrames.SEQUENCE_INDEX_COLUMN);
          }
          frame = zeromeanUnitVariance(frame, excludeColumns);
          return DataFrames.toRecordsSequence(frame).getSecond();
      }
docs: Normalize the sequence by zero mean unit variance
  
  @param schema         Schema of the data to normalize
  @param sequence       Sequence data
  @param excludeColumns List of  columns to exclude from the normalization
  @return Normalized sequence