code: def test_config(self):
      self.config_tester.run_common_tests()
  
imports: import unittest
  from transformers import TrOCRConfig
  from transformers.testing_utils import is_torch_available, require_torch, torch_device
  from ...generation.test_generation_utils import GenerationTesterMixin
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor
label_desc: Use image node_id 5 for calling the TrOCRStandaloneDecoderModelTest obj's underlying member method code with example usage: obj.test_config() without return types