code: def _get_outputs(self):
      return torch.tensor([[2.0, 8.0]])
  
imports: import copy
  import unittest
  import torch
  from classy_vision.losses import build_loss, ClassyLoss, register_loss, SumArbitraryLoss
label_desc: Use image node_id 2 for calling the TestSumArbitraryLoss obj's underlying member method code with example usage: obj._get_outputs() and returns: torch