code: def _OpenFile(self, path):
      
      if not self._registry_file_reader:
        return None
  
      return self._registry_file_reader.Open(
          path, ascii_codepage=self._ascii_codepage)
docs: Opens a Windows Registry file.
  
      Args:
        path (str): path of the Windows Registry file.
  
      Returns:
        WinRegistryFile: Windows Registry file or None if not available.