* the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be

    @JvmField val PREFIX_CLEAN = "OkHttp cache v1\n".encodeUtf8()

    @JvmField val PREFIX_DIRTY = "OkHttp DIRTY :(\n".encodeUtf8()
    private const val FILE_HEADER_SIZE = 32L

    /**
     * Creates a new relay that reads a live stream from [upstream], using [file] to share that data
     * with other sources.
     *
     * **Warning:** callers to this method must immediately call [newSource] to create a source and

 *
 * To make HTTPS calls using an HTTP proxy server OkHttp must first negotiate a connection with
 * the proxy. This proxy connection is called a "TLS Tunnel" and is specified by
 * [RFC 2817][1]. The HTTP CONNECT request that creates this tunnel connection is special: it
 * does not participate in any [interceptors][Interceptor] or [event listeners][EventListener]. It
 * doesn't include the motivating request's HTTP headers or even its full URL; only the target

This [sample factory](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEvents.java) creates a unique ID for each call and uses that ID to differentiate calls in log messages.

```java
class PrintingEventListener extends EventListener {
  public static final Factory FACTORY = new Factory() {

   */
  open fun cacheConditionalHit(
    call: Call,
    cachedResponse: Response,
  ) {
  }

  fun interface Factory {
    /**
     * Creates an instance of the [EventListener] for a particular [Call]. The returned
     * [EventListener] instance will be used during the lifecycle of [call].
     *

          fileSystem.deleteIfExists(entry.cleanFiles[t])
          fileSystem.deleteIfExists(entry.dirtyFiles[t])
        }
        i.remove()
      }
    }
  }

  /**
   * Creates a new journal that omits redundant information. This replaces the current journal if it
   * exists.
   */
  @Synchronized
  @Throws(IOException::class)
  internal fun rebuildJournal() {
    journalWriter?.close()

  }

  private fun newEmptyKeyStore(keyStoreType: String?): KeyStore {
    return KeyStore.getInstance(keyStoreType ?: KeyStore.getDefaultType()).apply {
      val inputStream: InputStream? = null // By convention, 'null' creates an empty key store.
      load(inputStream, password)
    }
  }

   * messages. This does nothing if the web socket has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new web socket and immediately returns it. Creating a web socket initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be

    val actual = source!!.buffer().readUtf8()
    assertThat(actual).isEqualTo(expected)
  }

  /**
   * Returns true when all work currently in progress by the watchdog have completed. This method
   * creates more work for the watchdog and waits for that work to be executed. When it is, we know
   * work that preceded this call is complete.
   */
  private fun awaitWatchdogIdle() {
    val latch = CountDownLatch(1)

    state = STATE_READING_RESPONSE_BODY
    carrier.noNewExchanges()
    return UnknownLengthSource()
  }

  /**
   * Sets the delegate of `timeout` to [Timeout.NONE] and resets its underlying timeout
   * to the default configuration. Use this to avoid unexpected sharing of timeouts between pooled
   * connections.
   */
  private fun detachTimeout(timeout: ForwardingTimeout) {