code: def check_loss_output(self, result):
      self.parent.assertListEqual(list(result.loss.size()), [])
  
imports: import unittest
  from transformers import DebertaV2Config, is_torch_available
  from transformers.testing_utils import require_sentencepiece, require_tokenizers, require_torch, slow, torch_device
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 4 for calling the DebertaV2ModelTester obj's underlying member method code with example usage: obj.check_loss_output(result) without return types