private function mountIndents(string $serialized): string
    {
        $lines = explode("\n", $serialized);
        foreach ($lines as &$line) {
            $line = "    " . $line;
            unset($line);
        }

        return ltrim(join("\n", $lines));
    }
private function mountIndents(string $serialized): string
    {
        $lines = explode("\n", $serialized);
        foreach ($lines as &$line) {
            $line = "    " . $line;
            unset($line);
        }

        return ltrim(join("\n", $lines));
    }
private function mountIndents ( string $ serialized ) : string { $ lines = explode ( "\n" , $ serialized ) ; foreach ( $ lines as & $ line ) { $ line = "    " . $ line ; unset ( $ line ) ; } return ltrim ( join ( "\n" , $ lines ) ) ; }
Mount indents for column and index options.

@param $serialized
@return string
Mount indents for column and index options .