Leafo\ScssPhp\Parser::mediaExpression PHP Method

    protected function mediaExpression(&$out)
    {
        $s = $this->seek();
        $value = null;
        if ($this->literal('(') && $this->expression($feature) && ($this->literal(':') && $this->expression($value) || true) && $this->literal(')')) {
            $out = [Type::T_MEDIA_EXPRESSION, $feature];
            if ($value) {
                $out[] = $value;
            }
            return true;
        }
        $this->seek($s);
        return false;
    }