public function isGSheetFileNameIgnored($fullName): bool
    {

        $nameWithoutExtension = explode('.', $fullName)[0];

        if (
            '_' === substr($fullName, -1) ||
            '_' === substr($nameWithoutExtension, -1)
        ) {
            // @todo feedback that this file was ignored?
            return true;
        }

        return false;
    }