code: def test_sub_phonemizers(self):
      for lang in self.phonemizer.lang_to_phonemizer_name.keys():
          self.assertEqual(
              lang, self.phonemizer.lang_to_phonemizer[lang].language
          )
          self.assertEqual(
              self.phonemizer.lang_to_phonemizer_name[lang],
              self.phonemizer.lang_to_phonemizer[lang].name(),
          )
  
imports: import unittest
  from packaging.version import Version
  from TTS.tts.utils.text.phonemizers import ESpeak, Gruut, JA_JP_Phonemizer, ZH_CN_Phonemizer
  from TTS.tts.utils.text.phonemizers.bangla_phonemizer import BN_Phonemizer
  from TTS.tts.utils.text.phonemizers.multi_phonemizer import MultiPhonemizer
label_desc: Use image node_id 4 for calling the TestMultiPhonemizer obj's underlying member method code with example usage: obj.test_sub_phonemizers() without return types