code: def setUp(self):
      self.model_tester = GPTNeoXModelTester(self)
      self.config_tester = ConfigTester(
          self,
          config_class=GPTNeoXConfig,
          hidden_size=64,
          num_attention_heads=8,
      )
  
imports: import unittest
  from parameterized import parameterized
  from transformers import AutoTokenizer, GPTNeoXConfig, is_torch_available, set_seed
  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, ids_tensor, random_attention_mask
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 1 for calling the GPTNeoXModelTest obj's underlying member method code with example usage: obj.setUp() without return types