code: def findall(self, title=None):
          
          if title is None:
              return list(self)
          files = backend.iterfiles(self._drive, name=title)
          return [self[id] for id, _ in files]
docs: Fetch and return a list of spreadsheets with the given title.
  
          Args:
              title(str): title/name of the spreadsheets to return, or ``None`` for all
          Returns:
              list: list of new SpreadSheet instances (possibly empty)