code: def unzip_files(self, zip_file_name):
      zip_file_path = self.root / zip_file_name
      with zipfile.ZipFile(zip_file_path, "r") as zip_ref:
          zip_ref.extractall(self.root / zip_file_name.strip(".zip"))
  
imports: from argparse import Namespace
  import os
  import re
  import unittest
  from pathlib import Path
  from tqdm import tqdm
  from typing import List, Dict, Optional
  import torch
  from fairseq.checkpoint_utils import load_model_ensemble_and_task
  from fairseq.scoring.wer import WerScorer
  from fairseq.scoring.bleu import SacrebleuScorer
  from fairseq import utils
  import zipfile
label_desc: Use image node_id 14 for calling the TestFairseqSpeech obj's underlying member method code with example usage: obj.unzip_files(zip_file_name) without return types