code: def test_left_padding_compatibility(self):
      pass
  
imports: import tempfile
  import unittest
  from transformers import BlenderbotConfig, is_torch_available
  from transformers.testing_utils import backend_empty_cache, require_sentencepiece, require_tokenizers, require_torch, require_torch_fp16, slow, torch_device
  from transformers.utils import cached_property
  from ...generation.test_utils import GenerationTesterMixin
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 6 for calling the BlenderbotStandaloneDecoderModelTest obj's underlying member method code with example usage: obj.test_left_padding_compatibility() without return types