type errorCodeMap map[APIErrorCode]APIError

func (e errorCodeMap) ToAPIErrWithErr(errCode APIErrorCode, err error) APIError {
	apiErr, ok := e[errCode]
	if !ok {
		apiErr = e[ErrInternalError]
	}
	if err != nil {
		apiErr.Description = fmt.Sprintf("%s (%s)", apiErr.Description, err)
	}
	if region := globalSite.Region(); region != "" {
		if errCode == ErrAuthorizationHeaderMalformed {

				errs[idx] = err
			} else {
				tagSlc[idx] = tgs.ToMap()
			}
		}(idx, tgt)
	}
	wg.Wait()
	for idx, err := range errs {
		errCode := minio.ToErrorResponse(err).Code
		if err != nil && errCode != "NoSuchKey" && errCode != "NoSuchVersion" {
			return nil, proxyResult{Err: err}
		}
		if err == nil {
			tgs, _ = tags.MapToObjectTags(tagSlc[idx])
		}
	}
	if len(errs) == 1 {