docs: public boolean isMarshallable(Class<?> type) {
        MarshallingType marshallingType = typeHints.get(type);
        if (marshallingType != null) {
           Boolean marshallable = marshallingType.isMarshallable;
           return marshallable != null ? marshallable.booleanValue() : false;
        }
  
        return false;
     }