class_docstr: Actual model code for the Transresnet Agent.
docstr: Add up a list of encodings, some of which may be `None`.
  
  :param addends:
      tensors to add
  
  :return:
      sum of non-`None` addends
docstr_tok: ["Add","up","a","list","of","encodings",",","some","of","which","may","be","`","None","`",".",":","param","addends",":","tensors","to","add",":","return",":","sum","of","non-","`","None","`","addends"]
code: def sum_encodings(self, addends):
      """
      Add up a list of encodings, some of which may be `None`.
  
      :param addends:
          tensors to add
  
      :return:
          sum of non-`None` addends
      """
      addends = [a for a in addends if a is not None]
      return sum(addends) if len(addends) > 0 else None
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  import torch
  from torch import nn
  from torch import optim
  from parlai.agents.transformer.modules import TransformerEncoder
  from parlai.agents.transformer import transformer
  from parlai.utils.io import PathManager
label_desc: Use image node_id 17 for calling the TransresnetModel obj's underlying member method code with example usage: obj.sum_encodings(addends) and returns: unknown