code: def validate_files(file_list, prefix, default_handler=None):
      assert os.path.join(prefix, MANIFEST_FILE) in file_list
      assert os.path.join(prefix, "test_handler.py") in file_list
      assert os.path.join(prefix, "test_model.py") in file_list
      assert (
          os.path.join(prefix, "test_serialized_file.pt") in file_list
      )
      assert os.path.join(prefix, "dummy-artifacts.txt") in file_list
      assert os.path.join(prefix, "1.py") in file_list
  
      if default_handler == "text_classifier":
          assert os.path.join(prefix, "source_vocab.pt") in file_list
  
imports: import errno
  import json
  import os
  import platform
  import shutil
  import tempfile
  import time
  from argparse import Namespace
  from datetime import datetime
  from pathlib import Path
  import model_archiver
label_desc: Use image node_id 6 for calling a global function with example usage: validate_files(file_list, prefix, default_handler) without return types