public function getRows($special = false)
    {
        if ($special) {
            if ($special === 1) {
                return $this->specialRows['header'];
            } else {
                return $this->specialRows['footer'];
            }
        }

        return array_diff(
            array_keys($this->rows),
            array_merge($this->specialRows['header'], $this->specialRows['footer'])
        );
    }