fun <A1, A2, A3, R> f3(f: KFunction3<A1, A2, A3, R>, a1: A1, a2: A2, a3: A3): MetaFeature<R>
Creates a MetaFeature for the given function f which expects 3 arguments.
Notice for assertion function writers: you should use ExpectImpl.feature and pass a
class reference instead of using this convenience function (e.g. ExpectImpl.feature(MyClass::fun, ...)).
This way we are always able to report the function name, even if the subject is not defined which occurs if a
previous transformation of the subject could not be carried out.