docs: def _is_skippable(filename_full):
      """Handle things that are not optimizable files."""
  
      # File types
      if not Settings.follow_symlinks and os.path.islink(filename_full):
          return True
      if os.path.basename(filename_full) == timestamp.RECORD_FILENAME:
          return True
      if not os.path.exists(filename_full):
          if Settings.verbose:
              print(filename_full, 'was not found.')
          return True
  
      return False