docs: public void monitorCaches(CacheManager cacheManager) {
  		if (cacheManager == null) {
  			logger.warn("EhCache can't be monitored; CacheManager is null");
  			return;
  		}
  		for (String cacheName : cacheManager.getCacheNames()) {
  			monitorCache(cacheManager.getCache(cacheName));
  		}
  	}