[racket] Help require and provide

From: Grant Rettke (grettke at acm.org)
Date: Tue Feb 15 00:00:35 EST 2011

2011/2/14 José Lopes <jose.lopes at ist.utl.pt>:
> Suppose I have files A, B and C.
> Files A and B provide several functions, including function foo.
> File C wants to require both A and B. How can I choose which function foo I want?

[prefix-in] is a nice form, too.

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