code: def setUp(self):
      self.model_tester = BrosModelTester(self)
      self.config_tester = ConfigTester(
          self, config_class=BrosConfig, hidden_size=37
      )
  
imports: import copy
  import unittest
  from transformers.testing_utils import require_torch, slow, torch_device
  from transformers.utils import is_torch_available
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor, random_attention_mask
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 2 for calling the BrosModelTest obj's underlying member method code with example usage: obj.setUp() without return types