Command settings composition

[jvmlet]

Consider the cli that can do backup, restore and migrate (backup+restore).

class BackupSettings:CommandSettings{
    [CommandOption("--targetFilePath")]
    public string TargetFilePath{ get; set; }

    [CommandOption("--sourceConnectionString")]
    public string ConnectionString{ get; set; }
}
public class BackupCommand : AsyncCommand<BackupSettings> {
}

class RestoreSettings:CommandSettings{
    [CommandOption("--sourceFilePath")]
    public string SourceFilePath{ get; set; }

    [CommandOption("--targetConnectionString")]
    public string ConnectionString{ get; set; }
}
public class RestoreCommand : AsyncCommand<RestoreSettings> {
}

What would be the recommended way to model the MigrateSettings and MigrateCommand that executes backup and restore with the same backup file (value is inferred dynamically ) and propagated to both commands ?
Thanks

UPDATE :
It would be great to have nested settings binding support :

class MigrateSettings:CommandSettings{
 public BackupSettings  BackupSettings {get;set;}
 public RestoreSettings RestoreSettings {get;set;}
}

Of cause, collision in parameters names in nested settings should throw exception.