hunk.code_window:     _key: Key,
       subscribe: SWRSubscription<any, Data, Error>,
       config: SWRConfiguration & typeof SWRConfig.defaultValue
     ): SWRSubscriptionResponse<Data, Error> => {
       const [key] = serialize(_key)
       const originKey = _key
       // Prefix the key to avoid conflicts with other SWR resources.
       const subscriptionKey = key ? SUBSCRIPTION_PREFIX + key : undefined
       const swr = useSWRNext(subscriptionKey, null, config)
  
hunk.labels: keep keep keep keep replace replace keep keep keep keep keep
hunk.after_edit:     const [key, args] = serialize(_key)
  
hunk.file_path: subscription/src/index.ts
hunk.type: replace
file: export default async function fetcher(...args) {
    const res = await fetch(...args)
    return res.json()
  }
  