}
    for (int j = 0; j < 1000; j++) {
      builder.add(9);
    }
    ImmutableSortedSet<Integer> unused = builder.build();
    assertThat(compares[0]).isAtMost(10000);
    // hopefully something quadratic would have more digits
  }

     *   ...))`
     *
     * So it makes sense for the parameter (and thus the return type) to be @Nullable.
     *
     * Two other points:
     *
     * 1. We'll want to use something like @PolyNull once we can make that work for the various
     * platforms we target.
     *
     * 2. Kotlin's Map type has a getOrDefault method that accepts and returns a "plain V," in

  //    finally { guard.unlock(); }
  // Here are Justin's design notes about this:
  //
  // This idea has come up from time to time, and I think one of my
  // earlier versions of Monitor even did something like this. I ended
  // up strongly favoring the current interface.
  //
  // I probably can't remember all the reasons (it's possible you
  // could find them in the code review archives), but here are a few:
  //

     *   ...))`
     *
     * So it makes sense for the parameter (and thus the return type) to be @Nullable.
     *
     * Two other points:
     *
     * 1. We'll want to use something like @PolyNull once we can make that work for the various
     * platforms we target.
     *
     * 2. Kotlin's Map type has a getOrDefault method that accepts and returns a "plain V," in

 *
 * // 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

    val client =
      client
        .newBuilder()
        .retryOnConnectionFailure(false)
        .build()

    // Seed the connection pool so we have something that can fail.
    val request1 = Request.Builder().url(server.url("/")).build()
    val response1 = client.newCall(request1).execute()
    assertThat(response1.body.string()).isEqualTo("abc")

    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()

  }

  /**
   * 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.

    // The URL will remain available if hasNext() returned true...
    val i = cache.urls()
    assertThat(i.hasNext()).isTrue()

    // ...so even when we evict the element, we still get something back.
    cache.evictAll()
    assertThat(i.next()).isEqualTo(url.toString())

    // Remove does nothing. But most importantly, it doesn't throw!
    i.remove()
  }

  @Test

    server.enqueue(MockResponse(body = "abc"))
    server.enqueue(MockResponse.Builder().onResponseStart(CloseSocket()).build())
    server.enqueue(MockResponse(body = "def"))

    // Seed the connection pool so we have something that can fail.
    assertContent("abc", getResponse(newRequest("/")))
    val post =
      getResponse(
        Request(
          url = server.url("/"),
          body = "body!".toRequestBody(null),