Some object-oriented languages have syntactic constructs for
redirecting the inheritance chain for certain methods to totally
different objects that are not defined in the object's inheritance
hierarchy. This is not needed in SICStus Objects due to delegation.
Assume that the method m/n is linked to object
some_object, we just add a method for this:
m(X1, ..., Xn) :- some_object <: m(X1, ..., Xn) &