}

        private void assertNotClosed() {
            if (closed) {
                throw new IllegalStateException("cache is closed");
            }
        }

        @Override
        public <K, V> IndexedCache<K, V> createIndexedCache(String name, Class<K> keyType, Serializer<V> valueSerializer) {
            assertNotClosed();
            return createIndexedCache(name, valueSerializer);