code: def __getitem__(self, idx):
      assert isinstance(idx, slice)
      assert idx.step is None or idx.step == 1
  
      start = maybe.map(idx.start, self.tf.index_of)
      stop = maybe.map(idx.stop, self.tf.index_of)
  
      return ILoc(self.tf)[start:stop]
  
imports: from __future__ import annotations
  import dataclasses
  from typing import Any, Optional, NamedTuple, Union
  from typing_extensions import Literal
  from gluonts import maybe
  from ._period import Periods, Period
  from ._util import _replace
label_desc: Use image node_id 1 for calling the TimeView obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: ILoc