>
> p.s. While you "have the hood open", you might also want to do something 
> similar for `prop:procedure`? 
>

I would agree that it is A solution to this particular problem with this
particular prop. The "passthrough" of some form or other works well and is 
always
open to me as the language maintainer but it amounts to special-casing 
things and
making me the sole arbiter of what makes it into the language and what 
doesn't.
Notice however that nothing about our fancy datatype changes, its interface
remains the same, yet user gets a richer type. Which means there ought to 
be a way
to generalize this. To use your analogy I'd like to find out if there's a 
way to
"leave the hood open" just enough or at least let the user do the 
"passthrough"
trick without the need to dismantle the entire car.

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