And on the downside, this will contribute to the obscuration of Law of Demeter violations, leading to potentially lots of transient coupling and "stolen" dependencies (dependency hub in the extreme is an anti-pattern).
I've wanted this kind of thing before in the past, but I've found that the absence of direct support for train-wreck syntax and broken encapsulation in mocking frameworks was a good thing. This kind of thing is often a tell that there's a better design waiting to be realized.
Nonetheless, nice feature when cheating is fine and reasonable.
"Nonetheless, nice feature when cheating is fine and reasonable."
Which is often and should in fact be encouraged whenever possible.