}

      return result.build()
    }

    /**
     * Returns true if [fieldName] is an end-to-end HTTP header, as defined by RFC 2616,
     * 13.5.1.
     */
    private fun isEndToEnd(fieldName: String): Boolean {
      return !"Connection".equals(fieldName, ignoreCase = true) &&
        !"Keep-Alive".equals(fieldName, ignoreCase = true) &&
        !"Proxy-Authenticate".equals(fieldName, ignoreCase = true) &&