Walter: extend existing classes with new methods?

[Marcio]

Walter,

    Do you plan to add the ability of adding methods to an existing 
class, from another module?

    This ties to the issues raised at 
http://www.cs.princeton.edu/~dpw/popl/06/Tim-POPL.ppt and the fact that 
some languages/systems have had this capability for years (Smalltalk, 
for example, and more recently Ruby) with very beneficial results.

    Thanks,

marcio