public function exportToArray()
    {
        $data = $this->toArray();

        if (count($this->exportable) === 0) {
            return $data;
        }

        $exportData = [];
        foreach ($data as $key => $value) {
            if (in_array($key, $this->exportable)) {
                $exportData[$key] = $data[$key];
            }
        }
        return $exportData;
    }