public function add(array $data)
    {
        $result = null;
        $this->hook->attach('country.add.before', $data, $result, $this);

        if (isset($result)) {
            return (bool) $result;
        }

        $result = true;
        $this->db->insert('country', $data);
        $this->hook->attach('country.add.after', $data, $result, $this);
        return (bool) $result;
    }