code: def setUp(self):
      super().setUp()
      tokenizer = ByT5Tokenizer()
      tokenizer.save_pretrained(self.tmpdirname)
  
imports: import json
  import os
  import re
  import shutil
  import tempfile
  import unittest
  from typing import Tuple
  from transformers import AddedToken, BatchEncoding, ByT5Tokenizer
  from transformers.utils import cached_property, is_tf_available, is_torch_available
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 1 for calling the ByT5TokenizationTest obj's underlying member method code with example usage: obj.setUp() without return types