code: def test_sudachi_tokenizer_split_mode_B(self):
      tokenizer = SudachiTokenizer(
          sudachi_dict_type="core", sudachi_split_mode="B"
      )
  
      self.assertListEqual(tokenizer.tokenize("外国人参政権"), ["外国人", "参政権"])
  
imports: import os
  import pickle
  import unittest
  from transformers import AutoTokenizer
  from transformers.models.bert.tokenization_bert import BertTokenizer
  from transformers.models.bert_japanese.tokenization_bert_japanese import VOCAB_FILES_NAMES, BertJapaneseTokenizer, CharacterTokenizer, JumanppTokenizer, MecabTokenizer, SudachiTokenizer, WordpieceTokenizer
  from transformers.testing_utils import custom_tokenizers, require_jumanpp, require_sudachi
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 18 for calling the BertJapaneseTokenizationTest obj's underlying member method code with example usage: obj.test_sudachi_tokenizer_split_mode_B() without return types