The ccUtil apex class provides two methods to check the input or return data of the Global API's: ccrz.ccUtil.isNotEmpty(Map<String, Object>) and ccrz.ccUtil.isEmpty(Map<String, Object>). These methods return true if the map is not null and contains at least one entry, or if the map is null or empty, respectively. Similarly, ccrz.ccUtil.isNotEmpty(List<Object>) and ccrz.ccUtil.isEmpty(List<Object>) return true if the list is not null and contains at least one element, or if the list is null or empty, respectively. These methods are useful for validating the input parameters or the output results of the Global API's.