code: def fetch(self, fetch_notes=None):
          
          if fetch_notes is None:
              fetch_notes = self.fetch_notes
          values, notes_index = get_sheet_values(self.name, self.sheet_name,
                                                 spreadsheet_service=self._spreadsheet_service,
                                                 get_notes=fetch_notes)
          self.raw_values = values
          self.values = [list(r) for r in zip(*itertools.zip_longest(*self.raw_values, fillvalue=''))]
          self.byCol = byCol(self.values, to_index=self.index_columns)
          self.notes_index = notes_index
docs: update remote values (called automatically at __init__)