code: def setUpClass(cls):
      cls.tokenizer: M2M100Tokenizer = M2M100Tokenizer.from_pretrained(
          cls.checkpoint_name, src_lang="en", tgt_lang="fr"
      )
      cls.pad_token_id = 1
      return cls
  
imports: import tempfile
  import unittest
  from pathlib import Path
  from shutil import copyfile
  from transformers import M2M100Tokenizer, is_torch_available
  from transformers.testing_utils import get_tests_dir, nested_simplify, require_sentencepiece, require_tokenizers, require_torch, slow
  from transformers.utils import is_sentencepiece_available
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 1 for calling the M2M100TokenizerIntegrationTest obj's underlying member method code with example usage: obj.setUpClass(cls) and returns: cls