class_docstr: Identity layer module.
  
  Useful for decoder-only Torch Generator agents.
class_docstr_tok: ["Identity","layer","module",".","Useful","for","decoder-only","Torch","Generator","agents","."]
docstr: Identity.
docstr_tok: ["Identity","."]
code: def forward(self, xs):
      """
      Identity.
      """
      return xs
  
imports: import os
  from typing import Union, Optional, Tuple, Any, List, Sized, TypeVar
  import itertools
  from collections import namedtuple
  import parlai.utils.logging
  import parlai.utils.io
  import torch.optim
label_desc: Use image node_id 1 for calling the IdentityLayer obj's underlying member method code with example usage: obj.forward(xs) and returns: xs