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Ops, errata.

As a last thought, just for fun:

If ooset can set OOBit of string values, you could write something like:

local oldlower = classes.string.lower

classes.string.lower = new function()  -- I forgot the new (it´s too
new for me :-))
 return "OO:" .. self.oldlower();

local s = new "test" -- using new to create a String Object
print (s.lower())