class_docstr: Applies the provided loss to the list of outputs (or single output) and sums
  up the losses.
code: def __init__(self, loss) -> None:
      super().__init__()
  
      self._loss = loss
  
file_path: ClassyVision/classy_vision/losses/multi_output_sum_loss.py
imports: from typing import Any, Dict
  import torch
  from .None import build_loss, ClassyLoss, register_loss
label_desc: Use image node_id 1 to create a new MultiOutputSumLoss object from inherited base classes: ClassyLoss with example: obj = MultiOutputSumLoss(loss)