code: def _trivial_sum(x, y):
      """
      Utility function used in lieu of lamda which are not picklable
      """
      return x + y
  
imports: from typing import Callable, List, Tuple, Union
  import numpy
  import torch
  import torch.nn
  from pytorchvideo.layers.utils import set_attributes
  from pytorchvideo.models.head import create_res_basic_head, create_res_roi_pooling_head
  from pytorchvideo.models.net import DetectionBBoxNetwork, Net
  from pytorchvideo.models.stem import create_acoustic_res_basic_stem, create_res_basic_stem
label_desc: Use image node_id 3 for calling a global function with example usage: _trivial_sum(x, y) and returns: unknown