class_docstr: Input channel for Twilio Voice.
class_docstr_tok: ["Input","channel","for","Twilio","Voice","."]
docstr: Raises an error if an invalid speech_model is provided.
docstr_tok: ["Raises","an","error","if","an","invalid","speech_model","is","provided","."]
code: def _raise_invalid_speech_model_exception(self) -> None:
      """Raises an error if an invalid speech_model is provided."""
      raise InvalidConfigException(
          f"The value {self.speech_model} for speech_model is invalid. "
          f"You must choose one of 'default', 'numbers_and_commands', "
          f"or 'phone_call'. Refer to the documentation for details "
          f"about the selections."
      )
  
imports: from sanic import Blueprint, response
  from sanic.request import Request
  from sanic.response import HTTPResponse
  from twilio.twiml.voice_response import VoiceResponse, Gather
  from typing import Text, Callable, Awaitable, List, Any, Dict, Optional
  import rasa.utils.io
  import rasa.shared.utils.io
  from rasa.shared.core.events import BotUttered
  from rasa.shared.exceptions import InvalidConfigException
  from rasa.core.channels.channel import InputChannel, CollectingOutputChannel, UserMessage
label_desc: Use image node_id 7 for calling the TwilioVoiceInput obj's underlying member method code with example usage: obj._raise_invalid_speech_model_exception() without return types