code: def test_tokenizer_lower(self):
      tokenizer = XLNetTokenizer.load(
          self.SAMPLE_VOCAB[0],
          configs={"do_lower_case": True, "keep_accents": False},
      )
      tokens = tokenizer.map_text_to_token(
          "I was born in 92000, and this is falsé."
      )
      self.assertListEqual(
          tokens,
          [
              SPIECE_UNDERLINE + "",
              "i",
              SPIECE_UNDERLINE + "was",
              SPIECE_UNDERLINE + "b",
              "or",
              "n",
              SPIECE_UNDERLINE + "in",
              SPIECE_UNDERLINE + "",
              "9",
              "2",
              "0",
              "0",
              "0",
              ",",
              SPIECE_UNDERLINE + "and",
              SPIECE_UNDERLINE + "this",
              SPIECE_UNDERLINE + "is",
              SPIECE_UNDERLINE + "f",
              "al",
              "se",
              ".",
          ],
      )
      self.assertListEqual(
          tokenizer.map_text_to_token("H\u00E9llo"), ["▁he", "ll", "o"]
      )
  
imports: import os
  import pickle
  import tempfile
  import tensorflow
  from texar.tf.data.data_utils import maybe_download
  from texar.tf.data.tokenizers.xlnet_tokenizer import XLNetTokenizer, SPIECE_UNDERLINE
  from texar.tf.utils.test import pretrained_test
label_desc: Use image node_id 10 for calling the XLNetTokenizerTest obj's underlying member method code with example usage: obj.test_tokenizer_lower() without return types