* This will overwrite any previously set status, body, or streamHandler.
     */
    fun webSocketUpgrade(listener: WebSocketListener) =
      apply {
        status = "HTTP/1.1 101 Switching Protocols"
        setHeader("Connection", "Upgrade")
        setHeader("Upgrade", "websocket")
        webSocketListener = listener
      }

    /**

    // TLS 1.3 https://tools.ietf.org/html/rfc8446
    @JvmField val TLS_AES_128_GCM_SHA256 = init("TLS_AES_128_GCM_SHA256", 0x1301)

    @JvmField val TLS_AES_256_GCM_SHA384 = init("TLS_AES_256_GCM_SHA384", 0x1302)

    @JvmField val TLS_CHACHA20_POLY1305_SHA256 = init("TLS_CHACHA20_POLY1305_SHA256", 0x1303)

The response will have non-null `cacheResponse` and `networkResponse`. The cacheResponse will be used as the top level
response only if the response code is HTTP/1.1 304 Not Modified.
 
 - CallStart
 - **CacheConditionalHit**
 - ConnectionAcquired
 - ... Standard Events...
 - ResponseBodyEnd _(0 bytes)_
 - **CacheHit**
 - ConnectionReleased
 - CallEnd
 

  }

  private fun upgradeResponse(request: RecordedRequest): MockResponse.Builder {
    val key = request.headers["Sec-WebSocket-Key"]
    return MockResponse.Builder()
      .status("HTTP/1.1 101 Switching Protocols")
      .setHeader("Connection", "Upgrade")
      .setHeader("Upgrade", "websocket")
      .setHeader("Sec-WebSocket-Accept", acceptHeader(key!!))
  }

    }

  fun withSettings(settings: Settings) =
    apply {
      this.settings = settings
    }

  fun withWebSocketUpgrade(listener: WebSocketListener) =
    apply {
      status = "HTTP/1.1 101 Switching Protocols"
      setHeader("Connection", "Upgrade")
      setHeader("Upgrade", "websocket")
      body = null
      webSocketListener = listener
    }

  override fun toString(): String = status