with(import std.datetime) auto foo(SysTime st1, SysTime st2, Duration d);
There is of course the middle way: with(from!q{std.datetime})
I would love to be able to use `with` and have the language
accept it in a wider range of places (e.g. module scope, on
expressions), but in its current form it's a statement and
introduces a scope, the inconsistency would be unpleasant.
