var noTransform = false
  var immutable = false

  var canUseHeaderValue = true
  var headerValue: String? = null

  loop@ for (i in 0 until headers.size) {
    val name = headers.name(i)
    val value = headers.value(i)

    when {
      name.equals("Cache-Control", ignoreCase = true) -> {
        if (headerValue != null) {
          // Multiple cache-control headers means we can't use the raw value.

	return len(s) >= len(prefix) && strings.EqualFold(s[:len(prefix)], prefix)
}

func headerValue(h http.Header, headerNames []string) string {
	for _, headerName := range headerNames {
		headerValue := h.Get(headerName)
		if len(headerValue) > 0 {
			return headerValue
		}
	}
	return ""
}

func allHeaderValues(h http.Header, headerNames []string) []string {
	ret := []string{}