return Response.Builder()
        .request(chain.request())
        .protocol(Protocol.HTTP_1_1)
        .code(HTTP_GATEWAY_TIMEOUT)
        .message("Unsatisfiable Request (only-if-cached)")
        .sentRequestAtMillis(-1L)
        .receivedResponseAtMillis(System.currentTimeMillis())
        .build().also {
          listener.satisfactionFailure(call, it)
        }
    }

    The upcoming Android Studio runs in a JVM but has classes from Android and that confused OkHttp!


## Version 3.14.8

_2020-04-28_

 *  Fix: Don't crash on Java 8u252 which introduces an API previously found only on Java 9 and
    above. See [Jetty's overview][jetty_8_252] of the API change and its consequences.

## Version 3.14.7

_2020-02-24_

      }
      append(" HTTP/1.1")
    }

  /**
   * Returns true if the request line should contain the full URL with host and port (like "GET
   * http://android.com/foo HTTP/1.1") or only the path (like "GET /foo HTTP/1.1").
   */
  private fun includeAuthorityInRequestLine(
    request: Request,
    proxyType: Proxy.Type,
  ): Boolean {
    return !request.isHttps && proxyType == Proxy.Type.HTTP
  }

 * ```java
 * Request request = new Request.Builder()
 *     .cacheControl(new CacheControl.Builder().noCache().build())
 *     .url("http://publicobject.com/helloworld.txt")
 *     .build();
 * ```
 *
 * If it is only necessary to force a cached response to be validated by the server, use the more
 * efficient `max-age=0` directive instead:
 *
 * ```java
 * Request request = new Request.Builder()

 * `::1` will reach the IPv6 server.
 *
 * By orchestrating two different servers with the same port but different IP addresses, we can
 * test what OkHttp does when both are reachable, or if only one is reachable.
 *
 * This test only runs on host machines that have both IPv4 and IPv6 addresses for localhost.
 */
@Timeout(30)
class FastFallbackTest {
  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

 * TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
 * **REMOVED:** ~~TLS_AES_128_CCM_SHA256[¹][tlsv13_only]~~
 * **REMOVED:** ~~TLS_AES_128_CCM_8_SHA256[¹][tlsv13_only]~~

##### MODERN_TLS / COMPATIBLE_TLS cipher suites

 * TLS_AES_128_GCM_SHA256[¹][tlsv13_only]
 * TLS_AES_256_GCM_SHA384[¹][tlsv13_only]
 * TLS_CHACHA20_POLY1305_SHA256[¹][tlsv13_only]
 * TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
 * TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

      throttleBytesPerPeriod = bytesPerPeriod
      throttlePeriodNanos = unit.toNanos(period)
    }

    /**
     * Set the delayed time of the response body to [delay]. This applies to the response body
     * only; response headers are not affected.
     */
    fun bodyDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {
      bodyDelayNanos = unit.toNanos(delay)
    }

    fun headersDelay(

  }

  private fun readStory(file: Path): Story {
    fileSystem.read(file) {
      return readStory(this)
    }
  }

  /** Iterate through the hpack-test-case resources, only picking stories for the current draft.  */
  fun storiesForCurrentDraft(): Array<String> {
    val resource =
      HpackJsonUtil::class.java.getResource("/hpack-test-case")
        ?: return arrayOf()

    val client =
      clientTestRule.newClientBuilder()
        .proxy(socksProxy.proxy())
        .build()
    val url =
      server.url("/")
        .newBuilder()
        .host(SocksProxy.HOSTNAME_THAT_ONLY_THE_PROXY_KNOWS)
        .build()
    val request = Request.Builder().url(url).build()
    val response1 = client.newCall(request).execute()
    assertThat(response1.body.string()).isEqualTo("abc")

      }
      frameHeader(
        streamId = 0,
        length = 0,
        type = TYPE_SETTINGS,
        flags = FLAG_ACK,
      )
      sink.flush()
    }
  }

  /**
   * HTTP/2 only. Send a push promise header block.
   *
   * A push promise contains all the headers that pertain to a server-initiated request, and a
   * `promisedStreamId` to which response frames will be delivered. Push promise frames are sent as