Got it..maybe. When you describe here
that roles are actually done with multiple inheritance, you are actually walking about multiple inheritance being used when you WALKMETH, so that even though you think
that you are only inheriting along a chain, some links of the chain of inheritance may choose to search a little hidden sub-bush. (Particularly if your Role declared that it is
some other class.)
Or something like that.
But it doesn't matter whether I understand this. I just hope that the implementor gets the joke...