class_docstr: TODO: Add voice conversion and Capacitron support.
code: def is_multi_lingual(self):
      # Not sure what sets this to None, but applied a fix to prevent crashing.
      if (
          isinstance(self.model_name, str)
          and "xtts" in self.model_name
          or self.config
          and (
              "xtts" in self.config.model
              or len(self.config.languages) > 1
          )
      ):
          return True
      if (
          hasattr(self.synthesizer.tts_model, "language_manager")
          and self.synthesizer.tts_model.language_manager
      ):
          return (
              self.synthesizer.tts_model.language_manager.num_languages
              > 1
          )
      return False
  
imports: import tempfile
  import warnings
  from pathlib import Path
  from typing import Union
  import numpy
  from torch import nn
  from TTS.utils.audio.numpy_transforms import save_wav
  from TTS.utils.manage import ModelManager
  from TTS.utils.synthesizer import Synthesizer
  from TTS.config import load_config
label_desc: Use image node_id 4 for calling the TTS obj's underlying member method code with example usage: obj.is_multi_lingual() and returns: False, True, unknown