public function remove($key)
    {
        if ($this->fast->remove($key)) {
            return $this->slow->remove($key);
        }

        return false;
    }
public function remove($key)
    {
        if ($this->fast->remove($key)) {
            return $this->slow->remove($key);
        }

        return false;
    }
@param string $key

@return bool