return new Iterator<Entry<K, V>>() {
        private @Nullable Entry<K, V> toRemove = null;
        private @Nullable Entry<K, V> nextOrNull = forward().lastEntry();

        @Override
        public boolean hasNext() {
          return nextOrNull != null;
        }

        @Override
        public Entry<K, V> next() {
          if (nextOrNull == null) {
            throw new NoSuchElementException();
          }

   */
  public static <E> ImmutableSet<E> copyOf(Iterator<? extends E> elements) {
    // We special-case for 0 or 1 elements, but anything further is madness.
    if (!elements.hasNext()) {
      return of();
    }
    E first = elements.next();
    if (!elements.hasNext()) {
      return of(first);
    } else {
      return new ImmutableSet.Builder<E>().add(first).addAll(elements).build();
    }
  }

  /**

   *     have the same bit length
   */
  public static HashCode combineOrdered(Iterable<HashCode> hashCodes) {
    Iterator<HashCode> iterator = hashCodes.iterator();
    checkArgument(iterator.hasNext(), "Must be at least 1 hash code to combine.");
    int bits = iterator.next().bits();
    byte[] resultBytes = new byte[bits / 8];
    for (HashCode hashCode : hashCodes) {
      byte[] nextBytes = hashCode.asBytes();

      scheduleOpener(connection.route.address)
      true
    } else {
      scheduleCloser()
      false
    }
  }

  fun evictAll() {
    val i = connections.iterator()
    while (i.hasNext()) {
      val connection = i.next()
      val socketToClose =
        connection.withLock {
          if (connection.calls.isEmpty()) {
            i.remove()
            connection.noNewExchanges = true

 * limitations under the License.
 */

package com.google.common.reflect;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

import java.io.Serializable;
import java.util.Comparator;
import java.util.List;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.DAYS;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.base.Function;
import com.google.common.cache.CacheBuilderFactory.DurationSpec;
import com.google.common.cache.LocalCache.Strength;
import com.google.common.collect.ImmutableMap;

          return new Iterator<V>() {
            int i;

            @Override
            public boolean hasNext() {
              return (i == 0) && map.containsKey(key);
            }

            @Override
            @ParametricNullness
            public V next() {
              if (!hasNext()) {
                throw new NoSuchElementException();
              }
              i++;

          return new Iterator<V>() {
            int i;

            @Override
            public boolean hasNext() {
              return (i == 0) && map.containsKey(key);
            }

            @Override
            @ParametricNullness
            public V next() {
              if (!hasNext()) {
                throw new NoSuchElementException();
              }
              i++;

                            HttpServletResponse.SC_UNAUTHORIZED);
                });
            }

            // assert
            if (null == principal) {
                final String msg = "Principal was null.";
                if (logger.isDebugEnabled()) {
                    logger.debug(msg);
                }

      exchange?.detachWithViolence()
    }

    interceptorScopedExchange = null
  }

  fun retryAfterFailure(): Boolean =
    exchange?.hasFailure == true &&
      exchangeFinder!!.routePlanner.hasNext(exchange?.connection)

  /**
   * Returns a string that describes this call. Doesn't include a full URL as that might contain
   * sensitive information.
   */
  private fun toLoggableString(): String =
    (