docs: def openall(self, title=None):
          """Opens all available spreadsheets.
  
          :param title: (optional) If specified can be used to filter
                        spreadsheets by title.
          :type title: str
  
          :returns: a list of :class:`~gspread.models.Spreadsheet` instances.
  
          """
          spreadsheet_files = self.list_spreadsheet_files()
  
          return [
              Spreadsheet(self, dict(title=x['name'], **x))
              for x in spreadsheet_files
          ]