[Rd] How to NAMESPACE OS-specific importFrom?

[Martin Morgan]

I'd like to importFrom(parallel, mccollect, mcparallel) but on Windows these are 
not exported because this

if(tools:::.OStype() == "unix") {
     export(mccollect, mcparallel, mc.reset.stream, mcaffinity)
}

appears at src/library/parallel/NAMESPACE:6 of svn r61857. So should I be doing

if (tools:::.OStype() == "unix") {
     importFrom(parallel, mccollect, mcparallel)
}

in my NAMESPACE? I have a recollection that this has come up before, perhaps 
even in the parallel package, but I'm not able to find anything.

Thanks,

Martin Morgan
-- 
Computational Biology / Fred Hutchinson Cancer Research Center
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