raise ValueError
    def _call(
        self,
        inputs: Dict[str, Any],
        run_manager: Optional[CallbackManagerForChainRun] = None,
    ) -> Dict[str, Any]:
        _run_manager = run_manager or CallbackManagerForChainRun.get_noop_manager()
        callbacks = _run_manager.get_child()
        output = cast(
            Dict[str, Any],
            self.llm_chain.predict_and_parse(callbacks=callbacks, **inputs),
        )
        return output
    async def _acall(
        self,
        inputs: Dict[str, Any],
        run_manager: Optional[AsyncCallbackManagerForChainRun] = None,
    ) -> Dict[str, Any]:
        _run_manager = run_manager or CallbackManagerForChainRun.get_noop_manager()
        callbacks = _run_manager.get_child()
        output = cast(
            Dict[str, Any],
            await self.llm_chain.apredict_and_parse(callbacks=callbacks, **inputs),
        )
        return output
[docs]    @classmethod
    def from_llm(
        cls, llm: BaseLanguageModel, prompt: BasePromptTemplate, **kwargs: Any
    ) -> LLMRouterChain:
        """Convenience constructor."""
        llm_chain = LLMChain(llm=llm, prompt=prompt)
        return cls(llm_chain=llm_chain, **kwargs)
[docs]class RouterOutputParser(BaseOutputParser[Dict[str, str]]):
    """Parser for output of router chain in the multi-prompt chain."""
    default_destination: str = "DEFAULT"
    next_inputs_type: Type = str
    next_inputs_inner_key: str = "input"
[docs]    def parse(self, text: str) -> Dict[str, Any]: