presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/ShardCleanerConfig.java/ShardCleanerConfig/getBackupCleanerInterval
class ShardCleanerConfig:    @NotNull
    @MinDuration("1m")
    public Duration getBackupCleanerInterval()
    {
        return backupCleanerInterval;
    }