presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/ShardCleanerConfig.java/ShardCleanerConfig/setBackupCleanTime
class ShardCleanerConfig:    @Config("raptor.backup-clean-time")
    @ConfigDescription("How long to wait after deletion before cleaning backup shards")
    public ShardCleanerConfig setBackupCleanTime(Duration backupCleanTime)
    {
        this.backupCleanTime = backupCleanTime;
        return this;
    }