"Nicolas Pouillard" <nicolas.pouillard@gmail.com> writes:

   That's some corner case where first-class modules would help a
   lot, however one can use some black magic under the hood to
   get the same effect. One need to store extensions once and for
   all, in a map from names to "modules". 

Sure, if you can store modules in an association list, you are
done. But how to store modules in an association list?

Bye,

Hendrik