value class MyValue {
    int x = 0;
}

public class Test {
    static void method(Object o) { }

    public static void main(String[] args) {
        // (1)
        MyValue val = new MyValue();
        // (2)
        method(new MyValue());
    }
}

If I only have (1), then Test.class has a MyValue preload attribute.
If I only have (2), there is no preload attribute.