How to use the jsii._kernel.types.BeginResponse function in jsii

def begin(self, request: BeginRequest) -> BeginResponse:
        return self._process.send(request, BeginResponse)

def ainvoke(
        self, obj: Referenceable, method: str, args: Optional[List[Any]] = None
    ) -> Any:
        if args is None:
            args = []

        promise = self.provider.begin(
            BeginRequest(
                objref=obj.__jsii_ref__,
                method=method,
                args=_make_reference_for_native(self, args),
            )
        )
        if isinstance(promise, Callback):
            promise = _callback_till_result(self, promise, BeginResponse)

        callbacks = self.provider.callbacks(CallbacksRequest()).callbacks
        while callbacks:
            for callback in callbacks:
                try:
                    result = _handle_callback(self, callback)
                except Exception as exc:
                    # TODO: Maybe we want to print the whole traceback here?
                    complete = self.provider.complete(
                        CompleteRequest(cbid=callback.cbid, err=str(exc))
                    )
                else:
                    complete = self.provider.complete(
                        CompleteRequest(cbid=callback.cbid, result=result)
                    )