docs: @Override
      public String[] getCacheStatisticNames(DCache cache) {
  
          Map statistics = getCacheStatisticsMap(cache.getCacheStatistics());
  
          String names[] = new String[statistics.size()];
          Iterator it = statistics.keySet().iterator();
          int i = 0;
          while (it.hasNext()) {
              names[i] = (String) it.next();
              i++;
          }
          return names;
      }