"ImmutableMapImpl",
    "TreeMapImpl",
    "ImmutableSortedMapImpl",
    "MapMakerWeakKeysWeakValues",
    "MapMakerWeakKeysStrongValues",
    "MapMakerStrongKeysWeakValues",
    "MapMakerStrongKeysStrongValues",
    "HashBiMapImpl",
    "ImmutableBiMapImpl"
  })
  String implName;

  MapsImplEnum mapsImpl;

  /**

      }
    },
    ImmutableMapImpl {
      @Override
      public <K extends Comparable<K>, V> Map<K, V> create(Map<K, V> map) {
        return ImmutableMap.copyOf(map);
      }
    },
    MapMakerStrongKeysStrongValues {
      @Override
      public <K extends Comparable<K>, V> Map<K, V> create(Map<K, V> map) {
        // We use a "custom" equivalence to force MapMaker to make a MapMakerInternalMap.