protected function exportFieldData(array $data)
    {
        $replacements = array("\n" => '\\n', "\r" => '\\r', "\t" => '\\t');

        foreach ($data as &$item) {
            $item = strtr((string) $item, $replacements);
        }
        fwrite($this->_file, implode("\t", $data) . "\r\n");
    }