public function has($key)
    {
        $storageKey = $this->computeStorageKey($key);
        $this->lastStorageKey = $storageKey;
        return isset($this->storage[$storageKey]);
    }
public function has($key)
    {
        $storageKey = $this->computeStorageKey($key);
        $this->lastStorageKey = $storageKey;
        return isset($this->storage[$storageKey]);
    }
{@inheritDoc}