// - total objects in a bucket
	// - object size histogram per bucket
	BucketsUsage map[string]BucketUsageInfo `json:"bucketsUsageInfo"`
	// Deprecated kept here for backward compatibility reasons.
	BucketSizes map[string]uint64 `json:"bucketsSizes"`

	// TierStats contains per-tier stats of all configured remote tiers
	TierStats *allTierStats `json:"tierStats,omitempty"`
}

func (dui DataUsageInfo) tierStats() []madmin.TierInfo {

		dataUsageInfo.BucketsUsage = make(map[string]BucketUsageInfo, len(dataUsageInfo.BucketSizes))
		for bucket, size := range dataUsageInfo.BucketSizes {
			dataUsageInfo.BucketsUsage[bucket] = BucketUsageInfo{Size: size}
		}
	}

	// For backward compatibility reasons, we need to add this code.
	if len(dataUsageInfo.BucketSizes) == 0 {
		dataUsageInfo.BucketSizes = make(map[string]uint64, len(dataUsageInfo.BucketsUsage))

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