internal fun cacheGet(
  cache: Cache,
  request: Request,
): Response? = cache.get(request)

internal fun applyConnectionSpec(
  connectionSpec: ConnectionSpec,
  sslSocket: SSLSocket,
  isFallback: Boolean,
) = connectionSpec.apply(sslSocket, isFallback)

internal fun ConnectionSpec.effectiveCipherSuites(socketEnabledCipherSuites: Array<String>): Array<String> =
  if (cipherSuitesAsString != null) {
    // 3 options here for ordering

By default, OkHttp will attempt a `MODERN_TLS` connection.  However by configuring the client connectionSpecs you can allow a fall back to `COMPATIBLE_TLS` connection if the modern configuration fails.

```java
OkHttpClient client = new OkHttpClient.Builder()
    .connectionSpecs(Arrays.asList(ConnectionSpec.MODERN_TLS, ConnectionSpec.COMPATIBLE_TLS))
    .build();
```

}

public final class okhttp3/ConnectionSpec {
	public static final field CLEARTEXT Lokhttp3/ConnectionSpec;
	public static final field COMPATIBLE_TLS Lokhttp3/ConnectionSpec;
	public static final field Companion Lokhttp3/ConnectionSpec$Companion;
	public static final field MODERN_TLS Lokhttp3/ConnectionSpec;
	public static final field RESTRICTED_TLS Lokhttp3/ConnectionSpec;

            if (socketMode.socketMode == Channel) {
              socketFactory(ChannelSocketFactory())
            }

            connectionSpecs(
              listOf(
                ConnectionSpec
                  .Builder(ConnectionSpec.COMPATIBLE_TLS)
                  .tlsVersions(socketMode.tlsVersion)
                  .supportsTlsExtensions(socketMode.tlsExtensionMode == STANDARD)

    e is ProtocolException -> false

    // If there was an interruption or timeout (SocketTimeoutException), don't recover.
    // For the socket connect timeout case we do not try the same host with a different
    // ConnectionSpec: we assume it is unreachable.
    e is InterruptedIOException -> false

    // If the problem was a CertificateException from the X509TrustManager, do not retry.

   noCache, noStore, noTransform, onlyIfCached, sMaxAgeSeconds
 * **Challenge**: authParams, charset, realm, scheme
 * **CipherSuite**: javaName
 * **ConnectionSpec**: cipherSuites, supportsTlsExtensions, tlsVersions
 * **Cookie**: domain, expiresAt, hostOnly, httpOnly, name, path, persistent, value
 * **Dispatcher**: executorService
 * **FormBody**: size
 * **Handshake**: cipherSuite, localCertificates, localPrincipal, peerCertificates, peerPrincipal,

      this.x509TrustManagerOrNull = trustManager
    }

    fun connectionSpecs(connectionSpecs: List<ConnectionSpec>) =
      apply {
        if (connectionSpecs != this.connectionSpecs) {
          this.routeDatabase = null
        }

        this.connectionSpecs = connectionSpecs.toImmutableList()
      }

    /**

HSPLokhttp3/ConnectionSpec$Builder;-><init>(Lokhttp3/ConnectionSpec;)V
HSPLokhttp3/ConnectionSpec$Builder;-><init>(Z)V
HSPLokhttp3/ConnectionSpec$Builder;->build()Lokhttp3/ConnectionSpec;
HSPLokhttp3/ConnectionSpec$Builder;->cipherSuites([Ljava/lang/String;)Lokhttp3/ConnectionSpec$Builder;
HSPLokhttp3/ConnectionSpec$Builder;->cipherSuites([Lokhttp3/CipherSuite;)Lokhttp3/ConnectionSpec$Builder;

    client =
      client
        .newBuilder()
        .hostnameVerifier(RecordingHostnameVerifier())
        .connectionSpecs(
          // Attempt RESTRICTED_TLS then fall back to MODERN_TLS.
          listOf(
            ConnectionSpec.RESTRICTED_TLS,
            ConnectionSpec.MODERN_TLS,
          ),
        ).sslSocketFactory(
          suppressTlsFallbackClientSocketFactory(),

  internal fun planConnectToRoute(
    route: Route,
    routes: List<Route>? = null,
  ): ConnectPlan {
    if (route.address.sslSocketFactory == null) {
      if (ConnectionSpec.CLEARTEXT !in route.address.connectionSpecs) {
        throw UnknownServiceException("CLEARTEXT communication not enabled for client")
      }

      val host = route.address.url.host