code: def test_contrastive_generate(self):
      pass
  
imports: import math
  import unittest
  from parameterized import parameterized
  from transformers import GPTBigCodeConfig, is_torch_available
  from transformers.testing_utils import require_torch, slow, torch_device
  from ...generation.test_utils import GenerationTesterMixin
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, floats_tensor, ids_tensor, random_attention_mask
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 6 for calling the GPTBigCodeModelTest obj's underlying member method code with example usage: obj.test_contrastive_generate() without return types