createMutationKeys with schema does not expose type mutationFn like the createQueryKeys function does

[siteassist-benjamin]

We need to access and reuse the mutationFn from one of the mutationKeys definitions. However the only property exposed by the library for createMutationKeys is the mutationKey.

This is not a problem with the createQueryKeys function - see examples below:

I have tried looking into where this would need to change but I am a little lost as the typing system is very complex. Any help would be deeply appreciated 🙏

[lukemorales]

@siteassist-benjamin the createMutationKeys types are in fact broken, it's a now issue #55 but I didn't have the time yet to fix it. I'll just close the issue as a duplicate of #55, but feel free to add any comments on that issue