* | `http://[::1]/`       | `"::1"`         |
   * | `http://xn--n3h.net/` | `"xn--n3h.net"` |
   */
  @get:JvmName("host") val host: String,
  /**
   * The explicitly-specified port if one was provided, or the default port for this URL's scheme.
   * For example, this returns 8443 for `https://square.com:8443/` and 443 for
   * `https://square.com/`. The result is in `[1..65535]`.
   *

   *       listeners can harm responsiveness, slow the system as a whole, or worse. (See also the
   *       note about locking below.)
   *   <li>If many tasks will be triggered by the same event, one heavyweight task may delay other
   *       tasks -- even tasks that are not themselves {@code directExecutor} tasks.
   *   <li>If many such tasks are chained together (such as with {@code

 * Access to the `Connection` that carries the request.

### Rewriting Requests

Interceptors can add, remove, or replace request headers. They can also transform the body of those requests that have one. For example, you can use an application interceptor to add request body compression if you're connecting to a webserver known to support it.

```java

  fun onePartRequired() {
    assertFailsWith<IllegalStateException> {
      MultipartBody.Builder().build()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Multipart body must have at least one part.")
    }
  }

  @Test
  fun singlePart() {
    val expected =
      """
      |--123
      |
      |Hello, World!
      |--123--
      |
      """.trimMargin().replace("\n", "\r\n")

   * plus the given elements, according to {@link #expectContents(java.util.Collection)}. In other
   * words, for the default {@code expectContents()} implementation, the number of occurrences of
   * each given element has increased by one since the test collection was created, and the number
   * of occurrences of all other elements has not changed.
   *
   * <p>Note: This means that a test like the following will fail if {@code collection} is a {@code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *

    LoadingCache<String, Integer> cache =
        CacheBuilder.newBuilder().removalListener(countingRemovalListener()).build(loader);

    assertThat(cache.getUnchecked("one")).isEqualTo(1);
    assertThat(cache.size()).isEqualTo(1);
  }

  public void testInitialCapacity_negative() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();

this change should be automatic.

**MockWebServer has a new coordinate and package name.** We didn’t like that our old artifact
depends on JUnit 4 so the new one doesn’t. It also has a better API built on immutable values. (We
intend to continue publishing the old `okhttp3.mockwebserver` artifact so there’s no urgency to
migrate.)

    throw new RuntimeException(e);
  }

  /**
   * Closes all {@code Closeable} instances that have been added to this {@code Closer}. If an
   * exception was thrown in the try block and passed to one of the {@code exceptionThrown} methods,
   * any exceptions thrown when attempting to close a closeable will be suppressed. Otherwise, the

import java.util.concurrent.TimeoutException;
import junit.framework.AssertionFailedError;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * A helper for concurrency testing. One or more {@code TestThread} instances are instantiated in a
 * test with reference to the same "lock-like object", and then their interactions with that object
 * are choreographed via the various methods on this class.
 *