required directive on inline fragment

I feel like most common use case for required directive will be in Node Queries

but relay compiler throws error when using required on INLINE FRAGMENT

Directive "@required" may not be used on INLINE_FRAGMENT.

```graphql
node(id: $id) {
id
__typename
... on Spoke @required(action: THROW) {
id
}
}
```

Any way to make relay generate type such that all elements on inline fragments are not nullable?