public static class SuperType {
    public int A;
}

public static class SubType extends SuperType {
    public int B;
}

public static class ParametricType<T> {
    public T Value;
}

@Test
public void doNotSerializeSubClassFieldsTest() throws Exception {
    var mapper = new ObjectMapper();
    var writer = mapper.writerFor(SuperType.class);

    var subType = new SubType();
    subType.A = 1;
    subType.B = 2;

    var expectedValue = "{"A":1}";
    var data = writer.writeValueAsString(subType);

    assertEquals(expectedValue, data);
}

@Test
public void serializeNotSubclassAuthenticatedMessageTest() throws Exception {
    var mapper = new ObjectMapper();
    var javaType = mapper.getTypeFactory().constructParametricType(ParametricType.class, SuperType.class);
    var writer = mapper.writerFor(javaType);

    var subType = new SubType();
    subType.A = 1;
    subType.B = 2;
    var parametricType = new ParametricType<>();
    parametricType.Value = subType;

    var expectedValue = "{"Value":{"A":1}}";
    var data = writer.writeValueAsString(parametricType);

    // it is actually "{"Value":{"A":1,"B":2}}"
    assertEquals(expectedValue, data);
}