func isInternalHeader(headerKey string) bool {
	return strings.HasPrefix(headerKey, ":") || strings.EqualFold(headerKey, "host")
}

// isAuthorityHeader returns true if a header refers to the authority header
func isAuthorityHeader(headerKey string) bool {
	return strings.EqualFold(headerKey, ":authority") || strings.EqualFold(headerKey, "host")

		}
	}
	return ""
}

func allHeaderValues(h http.Header, headerNames []string) []string {
	ret := []string{}
	for _, headerName := range headerNames {
		headerKey := http.CanonicalHeaderKey(headerName)
		values, ok := h[headerKey]
		if !ok {
			continue
		}

		for _, headerValue := range values {
			if len(headerValue) > 0 {
				ret = append(ret, headerValue)
			}
		}
	}

		// for these per-revision ones anyways, since the prioritization is about preferring one revision over others.
		config.KeyComparison = func(leaderKey string) bool {
			return LocationPrioritizedComparison(leaderKey, l)
		}
	}

	return k8sleaderelection.NewLeaderElector(config)
}

func LocationPrioritizedComparison(currentLeaderRevision string, l *LeaderElection) bool {