// Validation of credentials
	if conf.AccessKey == "" || conf.SecretKey == "" {
		return nil, errors.New("both access and secret keys are required")
	}

	if conf.Bucket == "" {
		return nil, errors.New("no bucket name was provided")
	}

	u, err := url.Parse(conf.Endpoint)
	if err != nil {
		return nil, err
	}

	creds := credentials.NewStaticV4(conf.AccessKey, conf.SecretKey, "")

	}
	m.fileNotFound = m.fileNotFound || update.fileNotFound
}

// delete all cache data on disks.
func (m *metacache) delete(ctx context.Context) {
	if m.bucket == "" || m.id == "" {
		bugLogIf(ctx, fmt.Errorf("metacache.delete: bucket (%s) or id (%s) empty", m.bucket, m.id))
		return
	}
	objAPI := newObjectLayerFn()
	if objAPI == nil {
		internalLogIf(ctx, errors.New("metacache.delete: no object layer"))
		return
	}

		switch msgp.UnsafeString(field) {
		case "ID":
			z.ID, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "ID")
				return
			}
		case "Bucket":
			z.Bucket, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Bucket")
				return
			}
		case "BaseDir":
			z.BaseDir, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "BaseDir")
				return
			}

import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;
import org.opensearch.search.aggregations.bucket.missing.MissingAggregationBuilder;
import org.opensearch.search.aggregations.bucket.range.IpRangeAggregationBuilder;

import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;
import org.opensearch.search.aggregations.bucket.missing.MissingAggregationBuilder;
import org.opensearch.search.aggregations.bucket.range.IpRangeAggregationBuilder;

import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;
import org.opensearch.search.aggregations.bucket.missing.MissingAggregationBuilder;
import org.opensearch.search.aggregations.bucket.range.IpRangeAggregationBuilder;

        return bucketsOfFirstElement + bucketsOfRestElements
    } else {
        val buckets = arrayListOf(largestElement)
        var restCapacity = roughSizeOfEachBucket - toIntFunction(largestElement)
        while (restCapacity > 0 && list.isNotEmpty() && buckets.size < maxNumberInBucket) {
            val smallestElement = list.findLast { searched -> buckets.all { canRunTogether(it, searched) } } ?: break
            list.remove(smallestElement)

					}
				default:
					err = dc.Skip()
					if err != nil {
						err = msgp.WrapError(err, "Flags")
						return
					}
				}
			}
		case "Bucket":
			z.Bucket, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Bucket")
				return
			}
		case "Prefix":
			z.Prefix, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Prefix")
				return
			}

	scannerLastActivitySeconds = "last_activity_seconds"
)

var (
	scannerBucketScansFinishedMD = NewCounterMD(scannerBucketScansFinished,
		"Total number of bucket scans finished since server start")
	scannerBucketScansStartedMD = NewCounterMD(scannerBucketScansStarted,
		"Total number of bucket scans started since server start")
	scannerDirectoriesScannedMD = NewCounterMD(scannerDirectoriesScanned,
		"Total number of directories scanned since server start")

// it is intended to be expanded when the function is worked on in the future.
func TestGetAndValidateAttributesOpts(t *testing.T) {
	globalBucketVersioningSys = &BucketVersioningSys{}
	bucket := minioMetaBucket
	ctx := t.Context()
	testCases := []struct {
		name            string
		headers         http.Header
		wantObjectAttrs map[string]struct{}
	}{
		{
			name:            "empty header",