Json.java

public abstract class Json {

    private Json() {
    }

    public abstract <T> T match(Function<Jseq, T> a,
                                Function<Jobj, T> b,
                                Function<Jnumber, T> c,
                                Function<Jstring, T> d,
                                Function<Jboolean, T> e,
                                Function<JNull, T> f
);