For example,
KMemberFunction2<T, P1, P2, R> : KMemberFunction<T, R>
So for this inheritance the heuristic that was present ("take the last K type
parameters of the subclass, and substitute for K parameters of the superclass")
was wrong. The new heuristic for this case is: take type parameters with the
same names.
Also don't store "parameters" in a lazy value, since it's easy to compute and
it's computed practically every time anyway
Alexander Udalov