code: def test_file_io_copy(self):
      PathManager.copy(
          self._tmpfile, os.path.join(self._tmpdir, "test_copy.txt")
      )
      with open(os.path.join(self._tmpdir, "test_copy.txt")) as f:
          s = f.read()
      self.assertEqual(s, self._tmpfile_contents)
  
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 4 for calling the TestFileIO obj's underlying member method code with example usage: obj.test_file_io_copy() without return types