php - Migrating to LeaqueFlysystem SFTP from v1 to v3, how I can configure the V3 permissions to match the V1 directoryPerm?

In my composer I have the following dependency:

"league/flysystem-sftp": "^1.0",
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And I upgraded into:

"league/flysystem-sftp-v3": "^3.0",
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The existing code is:

        $adapter = new SftpAdapter([
            'host'          => $host,
            'port'          => $port,
            'username'      => $username,
            'privateKey'    => 'id-rsa',
            'root'          => '/',
            'timeout'       => 20,
            'directoryPerm' => 0755,
        ]);

        $sftp = new Filesystem($adapter);
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According to the documetation I need to change the code ingo this:

$connectionProvider = new SftpConnectionProvider(
    $host,
    $username,
    null,
    'id-rsa.ppk',
    null,
    (int)$port,
    false,
    20
);

$visibility = PortableVisibilityConverter::fromArray([
   // IDK what to place here
]);

$adapter = new SftpAdapter($connectionProvider,"/",$visibility);

$sftp = new Filesystem($adapter);
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But I have trouble to understand the following piece of documentation: https://flysystem.thephpleague.com/docs/adapter/sftp-v3/

I mean in my case I only have the setting:

            'directoryPerm' => 0755,
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Whereas at documentation have:

 PortableVisibilityConverter::fromArray([
        'file' => [
            'public' => 0640,
            'private' => 0604,
        ],
        'dir' => [
            'public' => 0740,
            'private' => 7604,
        ],
    ])
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And I have trouble to understand what I am supposed to place in here. The previous version offlysystem-sftp has a simpler approach whilst new one has to configure bothprivate andpublic configuration of files.

Thereafter should I just configure it as?

$visibility = PortableVisibilityConverter::fromArray([
            'dir'=>[
                'private'=>0755,
                'public' => 0755
            ],
        ]);
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