}
    }

    private static class Map1<K, V> extends AbstractImmutableMap<K, V> {
        private final Entry<K, V> entry;

        private Map1(K key, V value) {
            this.entry = new SimpleImmutableEntry<>(key, value);
        }

        @Override
        public Set<Entry<K, V>> entrySet() {
            return new AbstractImmutableSet<Entry<K, V>>() {
                @Override

        }
    }

    private static class Map1<K, V> extends AbstractImmutableMap<K, V> {
        private final Entry<K, V> entry;

        private Map1(K key, V value) {
            this.entry = new SimpleImmutableEntry<>(key, value);
        }

        @Override
        public Set<Entry<K, V>> entrySet() {
            return new AbstractImmutableSet<Entry<K, V>>() {
                @Override

                        }

                        @Override
                        public Entry<K, V> next() {
                            Entry<K, T> n = it.next();
                            return new SimpleImmutableEntry<>(n.getKey(), mapper.apply(n.getValue()));
                        }
                    };
                }

                @Override
                public int size() {

   * UnsupportedOperationException}.
   */
  static <K, V> Entry<K, V> entryOf(K key, V value) {
    checkEntryNotNull(key, value);
    return new AbstractMap.SimpleImmutableEntry<>(key, value);
  }

  /**
   * Returns a new builder. The generated builder is equivalent to the builder created by the {@link
   * Builder} constructor.
   */

          @SuppressWarnings("unchecked")
          V value = (V) requireNonNull(alternatingKeysAndValues[2 * index + (keyOffset ^ 1)]);
          return new AbstractMap.SimpleImmutableEntry<K, V>(key, value);
        }

        @Override
        public int size() {
          return size;
        }

        @Override
        public boolean isPartialView() {