*
 * // later
 * try { // get() will throw if the operation failed or was cancelled.
 *   UserName userName = userNameValueAndCloser.get();
 *   // do something with userName
 * } finally {
 *   userNameValueAndCloser.closeAsync();
 * }
 * }
 *
 * In this example, when {@code userNameValueAndCloser.closeAsync()} is called, the transaction and

      map1.put(i, null);
    }
    assertWithMessage("table size after adding %s elements", size)
        .that(bucketsOf(map1))
        .isEqualTo(initialBuckets);

    /*
     * Something slightly different happens when the entries are added all at
     * once; make sure that passes too.
     */
    map2.putAll(map1);
    assertWithMessage("table size after adding %s elements", size)

      throw new UnsupportedOperationException("Not available on ImmutableSortedMap.Builder");
    }

    /*
     * While the current implementation returns `this`, that's not something we mean to guarantee.
     * Anyway, the purpose of this method is to implement a BinaryOperator combiner for a Collector,
     * so its return value will get used naturally.
     */

    server.enqueue(
      MockResponse(body = body),
    )
    client =
      client
        .newBuilder()
        .readTimeout(Duration.ofMillis(500)) // Half a second to read something.
        .build()

    // Make a call expecting a timeout reading the response body.
    val call1 = client.newCall(Request(server.url("/")))
    val response1 = call1.execute()

      map1.put(i, null);
    }
    assertWithMessage("table size after adding %s elements", size)
        .that(bucketsOf(map1))
        .isEqualTo(initialBuckets);

    /*
     * Something slightly different happens when the entries are added all at
     * once; make sure that passes too.
     */
    map2.putAll(map1);
    assertWithMessage("table size after adding %s elements", size)

  }

  /**
   * When writing a set of headers fails due to an `IOException`, make sure the writer is left
   * in a consistent state so the next writer also gets an `IOException` also instead of
   * something worse (like an [IllegalStateException].
   *
   *
   * See https://github.com/square/okhttp/issues/1651
   */
  @Test fun socketExceptionWhileWritingHeaders() {
    peer.acceptFrame() // SYN_STREAM.