* upgraded to HTTPS or HTTP/2.
     */
    fun inTunnel() =
      apply {
        removeHeader("Content-Length")
        inTunnel = true
      }

    /**
     * Adds an HTTP 1xx response to precede this response. Note that this response's
     * [headers delay][headersDelay] applies after this response is transmitted. Set a
     * headers delay on that response to delay its transmission.
     */

 *  New: Kotlin-specific APIs for request tags. Kotlin language users can lookup tags with a type
    parameter only, like `request.tag<MyTagClass>()`.
 *  New: MockWebServer has improved support for HTTP/1xx responses. Once you've migrated to the new
    `mockwebserver3` package, there's a new field, `MockResponse.informationalResponses`.
 *  Fix: Don't interpret trailers as headers after an HTTP/100 response. This was a bug only when