src/main/java/org/organicdesign/fp/tuple/Tuple7.java
public static <A,B,C,D,E,F,G> Tuple7<A,B,C,D,E,F,G> of(A a, B b, C c, D d, E e, F f, G g) {
        return new Tuple7<>(a, b, c, d, e, f, g);
    }
public static <A,B,C,D,E,F,G> Tuple7<A,B,C,D,E,F,G> of(A a, B b, C c, D d, E e, F f, G g) {
        return new Tuple7<>(a, b, c, d, e, f, g);
    }
Public static factory method