Find import declaration importing a certain function
Given the command
:find foo, find all import declaration that import this symbol.
Example:
> *ModA *ModB *ModC are loaded. Suppose the modules all export Data.List.
So, given
module ModX(module Data.List) where import Data.List with X \in {A,B,C}
Now, when one currently does :i for a function in Data.List, one gets back that it is defined in Data.List, but that's not the information the user is interested in. The user wants to know which modules define a certain symbol, so in this case it should say that modules ModA, ModB and ModC brought that symbol into scope.
The user-interface could also simply be :i as it is now, but with one extra line saying where it was imported.