code: def __len__(self) -> int:
      return (
          len(self._folds_container.folds)
          if self._folds_container.folds is not None
          else 0
      )
  
imports: import typing
label_desc: Use image node_id 2 for calling the _FoldsView obj's underlying member method code with example usage: obj.__len__() and returns: unknown