code: def configure_default(self, **_options):
          '''
          Sets default configuration.
  
          Raises TTSError on error.
          '''
          language, voice, voiceinfo, options = self._configure(**_options)
          self.languages_options[language] = (voice, options)
          self.default_language = language
          self.default_options = optionf configure_default(self, **_options):
          '''
          Sets default configuration.
  
          Raises TTSError on error.
          '''
          language, voice, voiceinfo, options = self._configure(**_options)
          self.languages_options[language] = (voice, options)
          self.default_language = language
          self.default_options = options
docs: Sets default configuration.
  
          Raises TTSError on error.