*
     * Other TLS features are still used but provide no security benefits in absence of the above
     * gaps. For example, an insecure TLS connection is capable of negotiating HTTP/2 with ALPN and
     * it also has a regular-looking handshake.
     *
     * **This feature is not supported on Android API levels less than 24.** Prior releases lacked
     * a mechanism to trust some hosts and not others.
     *

        servedDate != null -> {
          conditionName = "If-Modified-Since"
          conditionValue = servedDateString
        }

        else -> return CacheStrategy(request, null) // No condition! Make a regular request.
      }

      val conditionalRequestHeaders = request.headers.newBuilder()
      conditionalRequestHeaders.addLenient(conditionName, conditionValue!!)

      val conditionalRequest =

    assertThat(response4.body.string()).isEqualTo("C")
    assertThat(response4.code).isEqualTo(HttpURLConnection.HTTP_OK)
    assertThat(response4.message).isEqualTo("C-OK")
    server.takeRequest() // regular get
    return server.takeRequest() // conditional get
  }

  @Test
  fun immutableIsCached() {
    server.enqueue(
      MockResponse.Builder()

signs the other party's chain.

Well-Known Certificate Authorities
----------------------------------

In these examples we've prearranged which root certificates to trust. But for regular HTTPS on the
Internet this set of trusted root certificates is usually provided by default by the host platform.
Such a set typically includes many root certificates from well-known certificate authorities like

A77A          ; valid                                  # 5.1  LATIN SMALL LETTER INSULAR D
A77B          ; mapped                 ; A77C          # 5.1  LATIN CAPITAL LETTER INSULAR F
A77C          ; valid                                  # 5.1  LATIN SMALL LETTER INSULAR F
A77D          ; mapped                 ; 1D79          # 5.1  LATIN CAPITAL LETTER INSULAR G