code: def setUp(self):
      self.model_tester = MaskFormerModelTester(self)
      self.config_tester = ConfigTester(
          self, config_class=MaskFormerConfig, has_text_modality=False
      )
  
imports: import inspect
  import unittest
  import numpy
  from tests.test_modeling_common import floats_tensor
  from transformers import DetrConfig, MaskFormerConfig, SwinConfig, is_torch_available, is_vision_available
  from transformers.testing_utils import require_torch, require_torch_multi_gpu, require_vision, slow, torch_device
  from transformers.utils import cached_property
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin
label_desc: Use image node_id 1 for calling the MaskFormerModelTest obj's underlying member method code with example usage: obj.setUp() without return types