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 < A , B > Tuple2 < A , B > of ( A a , B b ) { return new Tuple2 <> ( a , b ) ; }
Public static factory method
Public static factory method