class A{
    B b;
}
class B{
    Long id;
    Long name;
}

假使只想查询出A中B对象的id字段，如何使用过滤器？
如下写法未见效

A a;
ObjectHolder<A> locked = new ObjectHolder<>();
FieldFilter.locked(A.class, “id”).run(() -> locked.set(dao.fetchLinks(a,"b")));