anchor.diff:     * [url].
      *
      * The `Host` header for the request will be set to the value
  -   * [Uri.host]:[Uri.port] from [url]. This can be overridden through the
  -   * [HttpClientRequest] interface before the request is sent.  NOTE
  -   * if [Uri.host] is an IP address this will still be set in the `Host`
  -   * header.
  +   * [Uri.host]:[Uri.port] from [url] (if [url.host] is an IP address, it will
  +   * still be used in the `Host` header). This can be overridden through the
  +   * [HttpClientRequest] interface before the request is sent.
      *
      * For additional information on the sequence of events during an
      * HTTP transaction, and the objects returned by the futures, see
  
positive.code:    * a possible query) is specified using [path].
     * The path may also contain a URI fragment, which will be ignored.
     *
     * The `Host` header for the request will be set to the value
     * [host]:[port]. This can be overridden through the
     * [HttpClientRequest] interface before the request is sent.  NOTE
     * if [host] is an IP address this will still be set in the `Host`
     * header.
     *
     * For additional information on the sequence of events during an
     * HTTP transaction, and the objects returned by the futures, see
  
negative.code:   /**
     * Gets and sets the content length of the response. If the size of
     * the response is not known in advance set the content length to
     * -1, which is also the default if not set.
     */
    int contentLength;
  
  