return chain.compare(one, other);
        public int compare(FileItem one, FileItem other) {            int comparison = String.valueOf(one.getOrderInItem()).compareTo(                    String.valueOf(other.getOrderInItem()));            // keep old behaviour            if (comparison != 0) {                return comparison;            } else {                return String.valueOf(one.getDisplayName()).compareTo(                        String.valueOf(other.getDisplayName()));            }        }