* of network interceptors; for application interceptors this is always null.
     */
    fun connection(): Connection?

    fun call(): Call

    fun connectTimeoutMillis(): Int

    fun withConnectTimeout(
      timeout: Int,
      unit: TimeUnit,
    ): Chain

    fun readTimeoutMillis(): Int

    fun withReadTimeout(
      timeout: Int,
      unit: TimeUnit,
    ): Chain

    readTimeoutMillis,
    writeTimeoutMillis,
  )

  override fun connection(): Connection? = exchange?.connection

  override fun connectTimeoutMillis(): Int = connectTimeoutMillis

  override fun withConnectTimeout(
    timeout: Int,
    unit: TimeUnit,
  ): Interceptor.Chain {
    check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }

 * Permitted to short-circuit and not call `Chain.proceed()`.
 * Permitted to retry and make multiple calls to `Chain.proceed()`.
 * Can adjust Call timeouts using withConnectTimeout, withReadTimeout, withWriteTimeout.

**Network Interceptors**

 * Able to operate on intermediate responses like redirects and retries.
 * Not invoked for cached responses that short-circuit the network.