code: def _check_split_list_validity(self):
          
          # FIXME: Currently very primitive, but needs to be fast
          if not (hasattr(self,"_splitListsSet") and (self._splitListsSet)):
              return False
          elif len(self) != self._splitListsLength:
              return False
          else:
              return True
docs: See _temporal_split_list above. This function checks if the current
          split lists are still valid.