code: def load_empty(cls, path:PathOrStr, fn:PathOrStr='export.pkl'):
          "Create a `LabelLists` with empty sets from the serialized file in `path/fn`."
          path = Path(path)
          state = torch.load(open(path/fn, 'rb'))
          return LabelLists.load_state(path, statef load_empty(cls, path:PathOrStr, fn:PathOrStr='export.pkl'):
          "Create a `LabelLists` with empty sets from the serialized file in `path/fn`."
          path = Path(path)
          state = torch.load(open(path/fn, 'rb'))
          return LabelLists.load_state(path, state)
docs: Create a `LabelLists` with empty sets from the serialized file in `path/fn`.