[racket] overriding unit functions with other units

From: Todd O'Bryan (toddobryan at gmail.com)
Date: Sat Jul 3 17:37:57 EDT 2010

I'm sure the answer is in the docs somewhere, but I can't parse it out.

I have a signature that provides a standard API and then a unit that
provides generic support for the API.

Now I want to provide support for more specific implementations.
Conceptually, what I think I want to do is import the generic unit and
then redefine any functions whose behavior needs to change before I
export it. Is that possible?


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