return new ConcurrentSkipListMap<>(map);
      }
    },
    ImmutableSortedMapImpl {
      @Override
      public <K extends Comparable<K>, V> SortedMap<K, V> create(Map<K, V> map) {
        return ImmutableSortedMap.copyOf(map);
      }
    };
  }

  enum BiMapImpl implements MapsImplEnum {
    HashBiMapImpl {
      @Override
      public <K extends Comparable<K>, V> BiMap<K, V> create(Map<K, V> map) {

        return new ConcurrentSkipListMap<>(map);
      }
    },
    ImmutableSortedMapImpl {
      @Override
      public <K extends Comparable<K>, V> SortedMap<K, V> create(Map<K, V> map) {
        return ImmutableSortedMap.copyOf(map);
      }
    };
  }

  enum BiMapImpl implements MapsImplEnum {
    HashBiMapImpl {
      @Override
      public <K extends Comparable<K>, V> BiMap<K, V> create(Map<K, V> map) {