// objectKeyed = transformEntries(map6, transformer);
    // objectKeyed = transformEntries(map8, transformer);
    // objectKeyed = transformEntries(map9, transformer);
    // numberKeyed = transformEntries(map8, transformer);
    // numberKeyed = transformEntries(map9, transformer);

    // Can't loosen the value type:
    // Map<Number, Number> looseValued1 = transformEntries(map5, transformer);

    static <K, V extends @Nullable Object> Set<Entry<K, V>> transformEntries(
        Set<Entry<K, V>> entries) {
      return new ForwardingSet<Map.Entry<K, V>>() {
        @Override
        protected Set<Entry<K, V>> delegate() {
          return entries;
        }

        @Override
        public Iterator<Entry<K, V>> iterator() {
          return UnmodifiableEntry.transformEntries(super.iterator());
        }

    // objectKeyed = transformEntries(map6, transformer);
    // objectKeyed = transformEntries(map8, transformer);
    // objectKeyed = transformEntries(map9, transformer);
    // numberKeyed = transformEntries(map8, transformer);
    // numberKeyed = transformEntries(map9, transformer);

    // Can't loosen the value type:
    // Map<Number, Number> looseValued1 = transformEntries(map5, transformer);

    static <K, V extends @Nullable Object> Set<Entry<K, V>> transformEntries(
        Set<Entry<K, V>> entries) {
      return new ForwardingSet<Map.Entry<K, V>>() {
        @Override
        protected Set<Entry<K, V>> delegate() {
          return entries;
        }

        @Override
        public Iterator<Entry<K, V>> iterator() {
          return UnmodifiableEntry.transformEntries(super.iterator());
        }

                  @Override
                  Multimap<String, String> transform(Multimap<String, String> multimap) {
                    return Multimaps.transformEntries(multimap, ENTRY_TRANSFORMER);
                  }
                })
            .named("Multimaps.transformEntries[Multimap]")
            .withFeatures(
                CollectionSize.ANY,
                MapFeature.SUPPORTS_REMOVE,

                      map.put(entry.getKey(), encode(entry.getValue()));
                    }
                    return Maps.transformEntries(map, DECODE_ENTRY_TRANSFORMER);
                  }
                })
            .named("Maps.transformEntries[Map, EntryTransformer]")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,

                      map.put(entry.getKey(), encode(entry.getValue()));
                    }
                    return Maps.transformEntries(map, DECODE_ENTRY_TRANSFORMER);
                  }
                })
            .named("Maps.transformEntries[Map, EntryTransformer]")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,

                  @Override
                  Multimap<String, String> transform(Multimap<String, String> multimap) {
                    return Multimaps.transformEntries(multimap, ENTRY_TRANSFORMER);
                  }
                })
            .named("Multimaps.transformEntries[Multimap]")
            .withFeatures(
                CollectionSize.ANY,
                MapFeature.SUPPORTS_REMOVE,

      return transformEntries(fromMap().headMap(toKey), transformer);
    }

    @Override
    @ParametricNullness
    public K lastKey() {
      return fromMap().lastKey();
    }

    @Override
    public SortedMap<K, V2> subMap(@ParametricNullness K fromKey, @ParametricNullness K toKey) {
      return transformEntries(fromMap().subMap(fromKey, toKey), transformer);
    }

      return transformEntries(fromMap().headMap(toKey), transformer);
    }

    @Override
    @ParametricNullness
    public K lastKey() {
      return fromMap().lastKey();
    }

    @Override
    public SortedMap<K, V2> subMap(@ParametricNullness K fromKey, @ParametricNullness K toKey) {
      return transformEntries(fromMap().subMap(fromKey, toKey), transformer);
    }