public static function cutStart(
        string $str,
        string $subString = ' ',
        bool $repeat = false,
        bool $caseSensitive = true
    ) : string {
        $prepared = RegEx::prepare($subString, '/');
        $regex = sprintf(
            '/^%s/%s',
            ($subString
                ? ($repeat ? RegexHelper::quantifyGroup($prepared, 0) : $prepared)
                : ''
            ),
            (!$caseSensitive ? 'i' : '')
        );

        return preg_replace($regex, '', $str);
    }