code: public synchronized void start() {
          for (final AttributeCache cache : attributeCacheMap.values()) {
              cache.startRefresh(POLLING_POOL);
          }
          for (final CommandCache cache : commandCacheMap.values()) {
              cache.startRefresh(POLLING_POOL);
          }
          if (stateCache != null) {
              stateCache.startRefresh(POLLING_POOL);
          }
          if (statusCache != null) {
              statusCache.startRefresh(POLLING_POOL);
          }
      }
docs: Start all polling