were placed along the course, here and there.  There was no `One,
two, three, and away,' but they began running when they liked,
and left off when they liked, so that it was not easy to know
when the race was over.  However, when they had been running half
an hour or so, and were quite dry again, the Dodo suddenly called
out `The race is over!' and they all crowded round it, panting,

     * be read without locking. Next fields of nodes are immutable (final). All list additions are
     * performed at the front of each bin. This makes it easy to check changes, and also fast to
     * traverse. When nodes would otherwise be changed, new nodes are created to replace them. This
     * works well for hash tables since the bin lists tend to be short. (The average length is less

were placed along the course, here and there.  There was no `One,
two, three, and away,' but they began running when they liked,
and left off when they liked, so that it was not easy to know
when the race was over.  However, when they had been running half
an hour or so, and were quite dry again, the Dodo suddenly called
out `The race is over!' and they all crowded round it, panting,

     * be read without locking. Next fields of nodes are immutable (final). All list additions are
     * performed at the front of each bin. This makes it easy to check changes, and also fast to
     * traverse. When nodes would otherwise be changed, new nodes are created to replace them. This
     * works well for hash tables since the bin lists tend to be short. (The average length is less

      NavigableMap<K, V> synchronizedNavigableMap(NavigableMap<K, V> navigableMap) {
    return Synchronized.navigableMap(navigableMap);
  }

  /**
   * {@code AbstractMap} extension that makes it easy to cache customized keySet, values, and
   * entrySet views.
   */
  @GwtCompatible
  abstract static class ViewCachingAbstractMap<
          K extends @Nullable Object, V extends @Nullable Object>