public final <U3> Tuple3<T1, T2, U3> map3(Function<? super T3, ? extends U3> function) {
        return Tuple.tuple(v1, v2, function.apply(v3));
    }
Apply attribute 3 as argument to a function and return a new tuple with the substituted argument.
jOOL/src/main/java/org/jooq/lambda/tuple/Tuple3.java