public class FilterWrapper implements Comparable {
        public String label {get; set;}
        public String value {get; set;}


        public Integer compareTo(Object compareTo) {
            FilterWrapper filterWrapper = (FilterWrapper) compareTo;
            if (label == filterWrapper.label) return 0;
            if (label > filterWrapper.label) return 1;
            return -1;
        }

    }

if(!resNameList.contains(resName)) {
                resNameList.add(resName);
            } else {
                Integer index = resNameList.indexOf(resName);
                resNameList.get(index).isShow = true;
            }

resNameList.contains(resName)