code: def test_token_bagging(self):
      tokenizer = self.get_tokenizer()
  
      # Testing tokenization
      input_text = "こんにちは、<|bagoftoken|>世界。こんばんは、<|bagoftoken|>㔺界。"
      expected_text = "こんにちは、、、、世界。こんばんは、、、、世界。"
      tokens = tokenizer.encode(input_text)
      output_text = tokenizer.decode(tokens)
      self.assertEqual(output_text, expected_text)
  
imports: import json
  import os
  import unittest
  from transformers.models.gptsan_japanese.tokenization_gptsan_japanese import VOCAB_FILES_NAMES, GPTSanJapaneseTokenizer
  from transformers.testing_utils import require_jinja, require_tokenizers, slow
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 9 for calling the GPTSanJapaneseTokenizationTest obj's underlying member method code with example usage: obj.test_token_bagging() without return types