Create a new runnable from the current one that will try invoking other passed fallback runnables if the initial invocation fails.
withFallbacks(
fields: __type | Runnable<ClassifierRequest<Record<string, __type | __type | __type | __type>>, ClassifierResponse<Record<string, __type | __type | __type | __type>>, RunnableConfig<Record<string, any>>>[]
): RunnableWithFallbacks<ClassifierRequest<Record<string, __type | __type | __type | __type>>, ClassifierResponse<Record<string, __type | __type | __type | __type>>>