Lack of documentation for QueryClientConfig and question about global management of mutation settlement

[mkarajohn]

I was looking into how to centralize displaying toasts on mutation resolution, globally, and I came across this article:
https://spin.atomicobject.com/toast-notifications-tanstack-query/

The suggested solution uses the mutationCache property of the QueryClientConfig object, so I decided to look it up, since I was not aware of it up to this point.

Now, as far as I searched for it, and I tried!, I could not find any documentation for mutationCache, or for defaultOptions or for QueryClientConfig in general in the docs.

So my questions are:

1. Is there a "blessed"/documented way to centrally manage what happens on mutation resolutions globally ?
2. Is the approach of the solution from the article not encouraged? If it's a valid approach, would it not make sense to document the QueryClientConfig in the docs?

[TkDodo]

yeah this should go to the API reference:

https://tanstack.com/query/v5/docs/reference/QueryClient