Can I use [$nuxt: The Nuxt.js helper](https://nuxtjs.org/docs/2.x/internals-glossary/$nuxt) functions with nuxt7? Currently, I have tried ``` $nuxt.isOffline $nuxt.isOnline $nuxt.$loading.start() $nuxt.$loading.stop() ``` and they are not working. Is there any way to access those functions? Or these functions couldn't be accessed by design?