code: def test_onnx_compliancy(self):
      pass
  
imports: import unittest
  from transformers import GPT2Config, is_tf_available
  from transformers.testing_utils import require_tf, require_tf2onnx, slow
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_tf_common import TFModelTesterMixin, floats_tensor, ids_tensor, random_attention_mask
  from ...utils.test_modeling_tf_core import TFCoreModelTesterMixin
label_desc: Use image node_id 13 for calling the TFGPT2ModelTest obj's underlying member method code with example usage: obj.test_onnx_compliancy() without return types