code: def check_language_codes(self):
      self.assertEqual(self.tokenizer.lang_code_to_id["pt"], 4)
      self.assertEqual(self.tokenizer.lang_code_to_id["ru"], 6)
      self.assertEqual(self.tokenizer.lang_code_to_id["it"], 9)
      self.assertEqual(self.tokenizer.lang_code_to_id["de"], 11)
  
imports: import unittest
  from pathlib import Path
  from shutil import copyfile
  from transformers import SPIECE_UNDERLINE, is_sentencepiece_available
  from transformers.models.speech_to_text import Speech2TextTokenizer
  from transformers.models.speech_to_text.tokenization_speech_to_text import VOCAB_FILES_NAMES, save_json
  from transformers.testing_utils import get_tests_dir, require_sentencepiece, require_tokenizers, slow
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 2 for calling the SpeechToTextTokenizerMultilinguialTest obj's underlying member method code with example usage: obj.check_language_codes() without return types