[racket] unrequire for modules, or a new, clean sub-context?

On Fri, Apr 26, 2013 at 6:44 PM, Sanjeev K Sharma <throwit1 at gmail.com> wrote:
> what do you do when you get the same procedure name between two required modules?  This is the key question,
> the next 2 are to further my understanding of (require ...) binding.

http://docs.racket-lang.org/reference/require.html#(form._((lib._racket/private/base..rkt)._prefix-in))