public static function split(string $header, string $separators): array
    {
        $quotedSeparators = preg_quote($separators, '/');

        preg_match_all('
            /
                (?!\s)
                    (?:
                        # quoted-string
                        "(?:[^"\\\\]|\\\\.)*(?:"|\\\\|$)
                    |
                        # token
                        [^"'.$quotedSeparators.']+
                    )+
                (?<!\s)
            |
                # separator
                \s*
                (?<separator>['.$quotedSeparators.'])
                \s*
            /x', trim($header), $matches, PREG_SET_ORDER);

        return self::groupParts($matches, $separators);
    }