Nativebase: Toastr error Cannot read property '_root' of undefined

[khanakia]

I am trying to make toastr example working but getting error https://docs.nativebase.io/Components.html#toast-def-headref

[SupriyaKalghatgi]

@mrkhanakia did you add Root?

[menarayanzshrestha]

Here is the docs for using Toast :
https://docs.nativebase.io/Components.html#toast-def-headref

import { Root } from 'native-base';