imports: from __future__ import annotations
  import inspect
  import random
  import unittest
  from transformers import XLNetConfig, is_tf_available
  from transformers.testing_utils import require_tf, slow
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_tf_common import TFModelTesterMixin, ids_tensor, random_attention_mask
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 1 for calling the TFXLNetModelLanguageGenerationTest obj's underlying member method code with example usage: obj.test_lm_generate_xlnet_base_cased() without return types