code: def forward(self, x: List[torch.Tensor]) -> List[torch.Tensor]:
      return x
  
imports: import copy
  import logging
  import warnings
  from typing import Callable, Dict, List, Union, Optional, Tuple, Sequence, Union, cast
  import torch
  import torch.nn
  from nni.mutable import Sample, label_scope
  from nni.nas.space import model_context
  from .choice import ChosenInputs, LayerChoice, InputChoice
  from .base import MutableModule
label_desc: Use image node_id 1 for calling the _ListIdentity obj's underlying member method code with example usage: obj.forward(x) and returns: x