code: def setUp(self):
      self.model_tester = FlaxOPTModelTester(self)
  
imports: import unittest
  import numpy
  import timeout_decorator
  from transformers import OPTConfig, is_flax_available
  from transformers.testing_utils import require_flax, require_sentencepiece, slow
  from ...generation.test_flax_utils import FlaxGenerationTesterMixin
  from ...test_modeling_flax_common import FlaxModelTesterMixin, ids_tensor
label_desc: Use image node_id 1 for calling the FlaxOPTModelTest obj's underlying member method code with example usage: obj.setUp() without return types