presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/backup/FileBackupConfig.java/FileBackupConfig/setBackupDirectory
class FileBackupConfig:    @Config("backup.directory")
    @ConfigDescription("Base directory to use for the backup copy of shard data")
    public FileBackupConfig setBackupDirectory(File backupDirectory)
    {
        this.backupDirectory = backupDirectory;
        return this;
    }