Assuming eventModel is loadable detachable model sould I implement some marker interfaces in the following model?

private static class SystemWarningEventImagePathModel extends 
AbstractReadOnlyModel {
        private IModel  eventModel;

        public SystemWarningEventImagePathModel( IModel eventModel ) {
                this.eventModel = eventModel;
        }

        @Override
        public Object getObject() {
                SystemWarningEvent event = (SystemWarningEvent) 
eventModel.getObject();
                return event.isReadFlag() ? "img/mobile/event_read.png" : 
"img/mobile/event_new.png";
        }
}


There are a number to take into account: IWrapModel, IChainingModel. Please advise.

--
Leszek Gawron

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