return defaultMeta, nil
	}

	// Copy is default behavior if not x-amz-metadata-directive is set.
	return defaultMeta, nil
}

// getRemoteInstanceTransport contains a roundtripper for external (not peers) servers
var remoteInstanceTransport atomic.Value

func setRemoteInstanceTransport(tr http.RoundTripper) {
	remoteInstanceTransport.Store(tr)
}