When SerializerFeature.WriteNullStringAsEmpty given in JSON.toJSONString, SerializerFeature.WriteMapNullValue in @JSONField does not work.

public class TestJson {
	@JSONField(serialzeFeatures=SerializerFeature.WriteMapNullValue)
	public String getValue() {
		return null;
	}

	public static void main(String[] args) throws Exception {
		System.out.println(JSON.toJSONString(new TestJson(), SerializerFeature.WriteNullStringAsEmpty));
	}
}

Expects {"value":null} but actually gets {"value":""}.

Version: 1.2.63_preview_01

Jackson alaways use @JsonInclude or @JsonSerialize on fields/methods prior to ObjectMapper settings.