code: def _model_input(self, batch):
      return (
          batch.text_vec,
          batch.know_vec,
          batch.ck_mask,
          batch.cs_ids,
          batch.use_cs_ids,
      )
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from itertools import chain
  from functools import lru_cache
  import torch
  import numpy
  from parlai.utils.torch import padded_tensor
  from parlai.utils.misc import round_sigfigs
  from parlai.agents.transformer.transformer import TransformerGeneratorAgent
  from .modules import EndToEndModel
  from parlai.tasks.wizard_of_wikipedia.agents import TOKEN_KNOWLEDGE
label_desc: Use image node_id 8 for calling the EndToEndAgent obj's underlying member method code with example usage: obj._model_input(batch) and returns: batch,  batch,  batch,  batch,  batch