[Haskell-cafe] How to import hidden modules

[David Feuer]

I'm a little confused. Data.Map.Internal from the containers package
isn't hidden at all! What version of containers are you using?

On Thu, Aug 31, 2017 at 11:05 AM, Ricardo Peña <ricardo at sip.ucm.es> wrote:
> Hi,
>
> I need to define a class instance for the algebraic datatype Data.Map.Map in
> the Hierarchical GCH libraries, but I do not find the way to import
> Data.Map.Internal which it is assumed to be hidden. Is there any way to
> access to this definition?
>
> Thanks
> -Ricardo
>
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