@Override
    public void remove(String region, String key) {
        Cache cacheRegion = getRegion(region);

        cacheRegion.remove(key);
    }
Same class as org.primefaces.cache.EHCache3Provider
we need to copy it, to support 6.2.x elite
primefaces-showcase/src/main/java/org/primefaces/showcase/util/EHCache3Provider.java