code: def setUp(self):
      self.model_tester = PLBartModelTester(self)
      self.config_tester = ConfigTester(self, config_class=PLBartConfig)
  
imports: import copy
  import tempfile
  import unittest
  from transformers import PLBartConfig, is_torch_available
  from transformers.testing_utils import require_sentencepiece, require_tokenizers, require_torch, slow, torch_device
  from transformers.utils import cached_property
  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 1 for calling the PLBartModelTest obj's underlying member method code with example usage: obj.setUp() without return types