+ /**
+ * (@inheritdoc)
+ */
+ public function clear($outdated = true)
+ {
+ if ($outdated) {
+ return true;
+ } else {
+ return $this->memcache->flush();
+ }
+ }
+
+ /**
+ * (@inheritdoc)
+ */
+ public function add($key, $value, $ttl = Cache::FIVE_MINUTES)