src/main/java/org/organicdesign/fp/tuple/Tuple2.java
public static <A,B> Tuple2<A,B> of(A a, B b) {
        return new Tuple2<>(a, b);
    }
public static <A,B> Tuple2<A,B> of(A a, B b) {
        return new Tuple2<>(a, b);
    }
Public static factory method