code: def forward(
      self, this: torch.Tensor, prev: List[torch.Tensor]
  ) -> Tuple[torch.Tensor, torch.Tensor]:
      return prev[-1], this
  
imports: from functools import partial
  from typing import List, Tuple
  import torch
  import torch.nn
  import torch.nn.functional
  import nni
  from nni.nas.nn.pytorch import ModelSpace, Cell, ParametrizedModule, LayerChoice, InputChoice, MutableLinear, MutableMultiheadAttention, MutableConv2d, MutableBatchNorm2d, Repeat
label_desc: Use image node_id 1 for calling the CellPostprocessor obj's underlying member method code with example usage: obj.forward(this, prev) and returns: prev,  this