// simply converts positional arguments to NewReader() into a
// more flexible way to provide optional inputs. This is currently
// used by the FanOut API call mostly to disable expensive md5sum
// calculation repeatedly under hash.Reader.
type Options struct {
	MD5Hex     string
	SHA256Hex  string
	Size       int64
	ActualSize int64
	DisableMD5 bool
	ForceMD5   []byte
}

			done = globalScannerMetrics.time(scannerMetricTierObjSweep)
			globalExpiryState.enqueueFreeVersion(oi)
			done()
		}

		// These are rather expensive. Skip if nobody listens.
		if globalTrace.NumSubscribers(madmin.TraceScanner) > 0 {
			if len(fivs.FreeVersions) > 0 {
				res["free-versions"] = strconv.Itoa(len(fivs.FreeVersions))
			}

				return
			}

			// Notify object created events.
			sendEvent(eventArgsList[i])

			if eventArgsList[i].Object.NumVersions > int(scannerExcessObjectVersions.Load()) {
				// Send events for excessive versions.
				sendEvent(eventArgs{
					EventName:    event.ObjectManyVersions,
					BucketName:   eventArgsList[i].Object.Bucket,
					Object:       eventArgsList[i].Object,
					ReqParams:    extractReqParams(r),