public static JSONWriter of(ObjectWriterProvider provider, Feature... features) {
        Context context = new Context(provider);
        context.config(features);
        return of(context);
    }
If ReferenceDetection has been set, returns the path of the current object, otherwise returns null
@since 2.0.51
@return the path of the current object
core/src/main/java/com/alibaba/fastjson2/JSONWriter.java