code: public static void validateResults(Map<Integer, Object> results) {
          for (Object result : results.values()) {
              if (result != null && result instanceof CacheClearResponse) {
                  Object response = ((CacheClearResponse) result).getResponse();
                  if (response instanceof Throwable) {
                      ExceptionUtil.sneakyThrow((Throwable) response);
                  }
              }
          }
      }
docs: Cache clear response validator, loop on results to validate that no exception exists on the result map.
  Throws the first exception in the map.
  
  @param results map of {@link CacheClearResponse}.