code: def _path_column(self):
          
          path_column = self._csv_kwargs.get('include_path_column')
  
          if path_column is None:
              # if path column name is not set by user, set to a unique string to
              # avoid conflicts
              path_column = unique_string()
              self._csv_kwargs['include_path_column'] = path_column
          elif isinstance(path_column, bool):
              path_column = 'path'
              self._csv_kwargs['include_path_column'] = path_column
          return path_column
docs: Set ``include_path_column`` in csv_kwargs and returns path column name