code: @Override
      public void configureWriteCache(long initDelay, long delayCache, long cacheSize){
          client.initTimer(initDelay, delayCache,cacheSize);
      }
docs: customise write cache interval and cache size.
  
  @param initDelay - initial interval before write cache is checked
  @param delayCache - interval (ms) to check write cache
  @param cacheSize - size (# triples) of write cache