code: def test_file_io_exists(self):
      self.assertEqual(
          PathManager.exists(self._tmpfile),
          os.path.exists(self._tmpfile),
      )
      fake_path = os.path.join(self._tmpdir, uuid.uuid4().hex)
      self.assertEqual(
          PathManager.exists(fake_path), os.path.exists(fake_path)
      )
  
file_path: mmf/tests/utils/test_file_io.py
imports: import os
  import shutil
  import tempfile
  import unittest
  import uuid
  from typing import Optional
  from mmf.utils.file_io import PathManager
label_desc: Use image node_id 5 for calling the TestFileIO obj's underlying member method code with example usage: obj.test_file_io_exists() without return types