DustMite: Unwrap? Imports?

[dsimcha]

I've recently started using DustMite to reduce compiler errors in 
SciD, which instantiates an insane number of templates and is 
nightmarish to reduce by hand.

Two questions:

1.  What exactly does unwrap (as opposed to remove) do?

2.  When there are multiple imports in a single statement, i.e. 
"import foo, bar;", does DustMite try to get rid of individual 
ones without deleting the whole statement?  Is this what unwrap 
does?