* #entries()}, and {@link #asMap()} return collections that are views of the multimap. If the
 * multimap is modified while an iteration over any of those collections is in progress, except
 * through the iterator's methods, the results of the iteration are undefined.
 *
 * <p>Keys and values may be null. All optional multimap methods are supported, and all returned

 *  Fix: Don't call `EventListener.responseHeadersStart()` or `responseBodyStart()` until bytes have
    been received. Previously these events were incorrectly sent too early, when OkHttp was ready to
    read the response headers or body, which mislead tracing tools. Note that the `responseFailed()`
    event always used to follow one of these events; now it may be sent without them.

 *  New: Upgrade to Kotlin 1.3.61.

  }

  // Condition.await() tests

  /*
   * RE: the WaitNotInLoop warnings:
   *
   * Our tests for awaitUninterruptibly are written under the assumption that no spurious wakeups
   * occur except for those produced by awaitUninterruptibly itself in response to interrupts.
   *
   * This isn't guaranteed to work, so any further spurious wakeups would probably cause failures in

     *
     * They may be subsequently nulled out by TreeMultiset.clear(). I think that the only place that
     * we can reference a node whose fields have been cleared is inside the iterator (and presumably
     * only under concurrent modification).
     *
     * To access these fields when you know that they are not null, call the pred() and succ()
     * methods, which perform null checks before returning the fields.
     */

   * 1}.)
   *
   * <p>There are three common APIs for determining the absolute value of an integer, all of which
   * behave identically except when passed {@code Integer.MIN_VALUE}. Those methods are:
   *
   * <ul>
   *   <li>{@link Math#abs(int)}, which returns {@code Integer.MIN_VALUE} when passed {@code
   *       Integer.MIN_VALUE}

   * function instances already exist, or so that you can supply lambda expressions. If those
   * circumstances don't apply, you probably don't need to use this; subclass {@code Converter} and
   * implement its {@link #doForward} and {@link #doBackward} methods directly.
   *
   * <p>These functions will never be passed {@code null} and must not under any circumstances

                            /*
                             * Before we return, in anticipation of this address being cached we must
                             * augment the addresses name's hashCode to distinguish those resolved by
                             * Lmhosts, WINS, or BCAST. Otherwise a failed query from say WINS would
                             * get pulled out of the cache for a BCAST on the same name.

   * cryptographically secure, but it produces a high-quality hash with few collisions. Fingerprints
   * generated using this are byte-wise identical to those created using the C++ version, but note
   * that this uses unsigned integers (see {@link com.google.common.primitives.UnsignedInts}).
   * Comparisons between the two should take this into account.
   *

   * values.
   */
  private final transient ImmutableSet<V> emptySet;

  /**
   * An instance created in {@link #readObject} to be returned from {@link #readResolve}. This field
   * is used only by those methods, and it is never set in a "normal" instance.
   *
   * <p>For more background, see {@code ConcurrentHashMultiset.deserializationReplacement}.
   */

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.annotations.GwtCompatible;
import java.nio.charset.StandardCharsets;

/**
 * Static methods pertaining to ASCII characters (those in the range of values {@code 0x00} through
 * {@code 0x7F}), and to strings containing such characters.
 *
 * <p>ASCII utilities also exist in other classes of this package:
 *
 * <ul>