Leafo\ScssPhp\Parser::progid PHP Метод

    protected function progid(&$out)
    {
        $s = $this->seek();
        if ($this->literal('progid:', false) && $this->openString('(', $fn) && $this->literal('(')) {
            $this->openString(')', $args, '(');
            if ($this->literal(')')) {
                $out = [Type::T_STRING, '', ['progid:', $fn, '(', $args, ')']];
                return true;
            }
        }
        $this->seek($s);
        return false;
    }