* proceed normally. If the client presents an untrusted certificate or no certificate at all the
   * handshake will fail and no connection will be established.
   */
  fun requireClientAuth() {
    this.clientAuth = CLIENT_AUTH_REQUIRED
  }

  /**
   * Awaits the next HTTP request, removes it, and returns it. Callers should use this to verify the

    mockWebServer.useHttps(SSLSocketFactory.getDefault() as SSLSocketFactory, false)
    mockWebServer.noClientAuth()
    mockWebServer.requestClientAuth()
    mockWebServer.requireClientAuth()
    val request: RecordedRequest = mockWebServer.takeRequest()
    val nullableRequest: RecordedRequest? = mockWebServer.takeRequest(0L, TimeUnit.SECONDS)
    var requestCount: Int = mockWebServer.requestCount