code: def test_get_vocab(self):
      tokenizer = self.get_tokenizer()
      vocab_keys = list(tokenizer.get_vocab().keys())
  
      self.assertEqual(vocab_keys[0], "</s>")
      self.assertEqual(vocab_keys[1], "<unk>")
      self.assertEqual(vocab_keys[-1], "<s>")
  
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 5 for calling the M2M100TokenizationTest obj's underlying member method code with example usage: obj.test_get_vocab() without return types